Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6caea832a5c723c…

MALICIOUS

PDF

90.4 KB Created: 2021-06-28 22:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 566732a356285cb7e67bcf2ad52e2445 SHA-1: 1f54c17fee4ca785a93501145938aa9792fbdcad SHA-256: c6caea832a5c723c7f1a107d7546daee72153ab6df3d3a64fc71c7f158712264
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farms pointing to potentially compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of 'LOLBin token sequence' in the document text indicates a potential attempt to disguise malicious commands or URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://inwebjor.ru/uplcv?utm_term=good+science+questions+and+answers PDF link annotation
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/u2m0n2t9m13fk8mc11fqm8detd/joxazuguvijirevukesafis.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/wigitiposaxeref.pdfIn PDF document text
    • http://kfbi.ru/content/file/rukolijiburamulatorepo.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/nd8cmdoqhcdkui1b96s78l75v6/7043530319.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/cu6na06trhtnuoo0fa2l6pooie/wesigakodafiku.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/gitalosinibuluzituw.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/e690008023a31e37a966126c31c66c32/35578135975.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/44573773365.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/5cdm8ohdb01p1nvdrlhg21vq11/riwetadefosuludilogo.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8o80760l5igolcnalarfsatb16/gifofewunewojineg.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/b974ad98e507ef4b930c1c36f05a0e7f/82323184042.pdfIn PDF document text
    • https://hirurgija.me//files/2751678435.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/f8a18eca20f981679230c74ecd62d745/54750636264.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/giuk11o4sokboim8a5lg8pg773/tujetajebiza.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/23741371633.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/472d48028736fd55a89837df8418ca2d/kizokalixi.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad5e4bdcef---sebaluwapilezazizojofoto.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/39908729573.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/japunatifetopitavefir.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096937fe2236---36599104610.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/a2473db5995754fe7d725fca8be4caa5/dixarebikuzexipivobixeki.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/dfd0063b4b0f8462009f1166fa6a0fe9/52255695348.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/lcvjukj9qnbtf9qa7nggdub9fg/kogevuzoz.pdfIn PDF document text
    • http://arablift.net/userfiles/file/saterudukosuwisukepewa.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609645c29c681---87189657097.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073335a25f75---49426029367.pdfIn PDF document text
    • https://www.hdcorp.coIn macro / runtime command snippet
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/346afb959d91f7a722919dc699339777/90444198067.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CF 10688 bytes
SHA-256: b078e99d2f1a9d5983dc617bbc487d963e54d39dc2bd38b613d330b6ecc881ca
font_01_sfnt_off00011958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 16388 bytes
SHA-256: 122d730597cc29763d391af8b56266dfe8b8ea99c30ebd695a492d57555ca3ea
font_02_sfnt_off000143b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.