Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd5c803f7cb67ff…

MALICIOUS

PDF

84.3 KB Created: 2021-09-01 00:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e3566a287e9ca923a0560c6a99871fdd SHA-1: 8cd474e3100ef2b4927886bc63c7daaba4057f57 SHA-256: 5fd5c803f7cb67ff0fbecb7ff71d3453c27bbc25b8727a927e68638e172a5703
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to compromised WordPress sites and disposable domains, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/037b98966980021ecfea64045ee1de41/63955032651.pdf In PDF document text
    • http://jrpst.pl/userfiles/file/magizov.pdfIn PDF document text
    • http://usagimatur.com/files/others/73553718184.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/30889711451.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d13bea9797---jobitavakesol.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/60969982055.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/nifadejitotugoxipixinoxa.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e64d3302d48---bigebumufazoturexawifo.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/muluwososapaxulorozarib.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118e361927fa---kitozuwakamowufupij.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/5a83bea25be864aa0c1ea5812ce29c06/sidasutofebuwilametaranow.pdfIn PDF document text
    • http://viajesalaos.com/webroot/img/files/turagilewukaxiwin.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/5c0abed7673e9ca28efd56b5ea573daf/natarakifalisemipujinimu.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/tagapogosunakoxidabasi.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080650dae993---33683325375.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/1577113523.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///33223479170.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160763794e81da---vilarivodaritazixibetel.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/96634430343.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/wakodipejobibebe.pdfIn PDF document text
    • http://ipublicity.cz/data/file/funerusum.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/35160638122.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=this+is+no+doubtPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC645 10108 bytes
SHA-256: a535abba96f33601c7ec86e2e0711121eda4f34260f9d52dbdf6df07c9816b06
font_01_sfnt_off0000dcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB7 16352 bytes
SHA-256: 9c09c88ae8c16bff84111354316359d021997fb4aad4f8972c10b81994a3a1b4
font_02_sfnt_off0000f31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 21132 bytes
SHA-256: 09882b9260a18391f6caab106cb94148e52dcd18847921cba06b26881ef98bd4
font_03_sfnt_off00012aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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