Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b05e944cda3e52d…

MALICIOUS

PDF

82.6 KB Created: 2021-03-21 01:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6d4e4d5b703f89ecafd90dba5fa9205c SHA-1: aa0cdbe9bbe6e47d725ed298b3f60fac818d1d57 SHA-256: 0b05e944cda3e52d690051dc79b08b50f6b547956ed3a9f3d7fb3a53fe7f92d2
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://lozipotod.ru/wix?keyword=harbor+freight+return+policy+no+receipt PDF link annotation
    • https://ranazujip.weebly.com/uploads/1/3/5/3/135398887/sumat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402504/normal_5fcae86c9ca23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388620/normal_5feb5a651ff77.pdfIn PDF document text
    • http://lezobul.medianewsonline.com/logosuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405190/normal_6047734c8bc53.pdfIn PDF document text
    • https://fatilisuwojumo.weebly.com/uploads/1/3/4/6/134652656/zamilopez_jojaxosixaze.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/sareruji-gamigemufedep-kusumag.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/wetega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421959/normal_5fdac8eb2b750.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/aramaic_lexicon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5ff6a7b0aa677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_601b8fbd3e887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494889/normal_5ffaad85e5ee6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woranuganavot.myartsonline.com/18415893885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be9736d-cc2a-453d-9d50-248159339d18/what_does_monstrosity_mean.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/what_books_are_in_the_catholic_bible_that_arent_in_others.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a708345-e2d8-443e-acce-5cc474c41455/88723689999.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/78392259310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6389f9-7437-409a-86a4-7a536345601c/13325183262.pdfIn PDF document text
    • http://mijovutotukedes.onlinewebshop.net/aviation_week_and_space_technology_magazine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b86d34-6753-4e68-a773-28ebac7ebd0f/kogevubazevegesinel.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_off0001029c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029C 5304 bytes
SHA-256: 3740b289ac722f6fdc0bc36388329d916589f45e3d42560b250b942ac8b12771
font_01_sfnt_off000114ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AB 11864 bytes
SHA-256: bb834726618ad843510bdd08ba88492111c748b29da931c977b437f66dc7fe1a

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