Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4ec6a32cdefce0…

MALICIOUS

PDF

85.1 KB Created: 2021-09-23 00:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 96a7672662b731e39b371b66cca1f1d3 SHA-1: 7cd24030136bc3cb479c7456272f9213f7d7f8eb SHA-256: 1e4ec6a32cdefce034fd4b3e1667cbb3fbee72b0caa65b829c8f5ffe6dedf54e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the link farm structure is a common tactic for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130681a965b5---galorubikufusujujolibo.pdf In PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/55191154685.pdfIn PDF document text
    • http://airfa.it/userfiles/file/xojitofax.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149359c1b99b---26268426275.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/12803194665.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/rutavevanukaludegibapila.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/74929126230.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/pujebofotujijedozugebo.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/lopudevowa.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/78821113313.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/43861504597.pdfIn PDF document text
    • http://m2m2design.com/userfiles/39283547360.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/rebuzixipevodolubuwemi.pdfIn PDF document text
    • https://havilahbuilders.com/userfiles/file/zibijenofukefubij.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/medisisetosagekajebonivo.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/67843769928.pdfIn PDF document text
    • https://dhrc.in/userfiles/file/12764399588.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/52533208506.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/97610615010.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/24465919800.pdfIn PDF document text
    • http://dentistturkey.com/image/files/rakilinalumotirolokel.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/t9d08hafbjtrelk0919t7kach7/daguzeruvalekutize.pdfIn PDF document text
    • http://smalternatywa.pl/media/upload/files/380e1c8d8cc57c3e4f3690b3621d4c63.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=android+mirror+to+pc+appPDF link annotation
    • 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_off0000eaa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 10308 bytes
SHA-256: a02033efdf5b5d51c809e56c42227a0f2c3c34dcf4a242f6d2cd912100db55a0
font_01_sfnt_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 17276 bytes
SHA-256: 6beeecb0603838b6addc8db2f65f419720dd3ac02dbd6ad591d71e589d0554e8
font_02_sfnt_off00012e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1