Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4290644b412bf2…

MALICIOUS

PDF

70.1 KB Created: 2021-02-21 17:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 777ad28b0b51d5c761641fdcf60e8eb9 SHA-1: a7597a083cd60c7571071dd1531850bf6cdd02a7 SHA-256: ee4290644b412bf269757f07ae4875eefb85ea943fd2dcf08bed729ca1fb9845
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains metadata related to 'Djing for dummies' and the wkhtmltopdf application, which is unusual for a legitimate document. No scripts were extracted, but the presence of numerous external links points to an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=djing+for+dummies PDF link annotation
    • https://dabosimupit.weebly.com/uploads/1/3/5/3/135397997/b72a100453fc5ef.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/mevufufomemefob.pdfIn PDF document text
    • https://sedezexe.weebly.com/uploads/1/3/4/3/134342112/4238612.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/hggjchj/gikasabekazu.pdfIn PDF document text
    • https://cdn.sqhk.co/ladetozuxi/VaFGQjj/bbc_sports_football_live_scores_africa.pdfIn PDF document text
    • https://jirakeleda.weebly.com/uploads/1/3/5/9/135992973/4a5510e679d8.pdfIn PDF document text
    • https://sewizafisebe.weebly.com/uploads/1/3/1/4/131437566/cfd44a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445531/normal_5ffece1a3471d.pdfIn PDF document text
    • https://wuluvaxezipow.weebly.com/uploads/1/3/5/3/135393263/1311687.pdfIn PDF document text
    • https://ziluxofizavamo.weebly.com/uploads/1/3/6/0/136009732/moweduserana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411270/normal_5fdc6b4a617ec.pdfIn PDF document text
    • https://nukogakulezov.weebly.com/uploads/1/3/1/3/131378840/269c7f18f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fca414b26eee.pdfIn PDF document text
    • https://zujizivuzilinum.weebly.com/uploads/1/3/5/3/135344014/likoxojow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378618/normal_5fcdae96c0ef8.pdfIn PDF document text
    • https://cdn.sqhk.co/rebiguta/Niahe9e/99945709674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_602038f70116c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bisubop.epizy.com/iala_guidelines_vts.pdfIn PDF document text
    • http://woloripovopakop.rf.gd/93986314562.pdfIn PDF document text
    • http://fasevirova.rf.gd/bunosugofowabawu.pdfIn PDF document text
    • http://zegisaxan.rf.gd/ditelosasu.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD758 5060 bytes
SHA-256: ac5ea24ab6994c13971257ada86745015a885d5e8e809e5fc7e6626cc2d0e4c2
font_01_sfnt_off0000e88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88A 10316 bytes
SHA-256: 6166e05ad4c089a2d459e2454dd622283b7d858208726ec0a046183c46a535df

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