Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fec556640a084df…

MALICIOUS

PDF

75.8 KB Created: 2021-04-05 18:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fb82debea892dcb8b91001232ea4cc25 SHA-1: c254155dbd467fdc2337a67a48a68ca51c10deb7 SHA-256: 2fec556640a084df762431a64191c13c9881537cfb82242a961a82771f8b7cc6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 5

  • 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.
  • 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://xajibur.ru/wix?keyword=bach+siloti+prelude+in+b+minor+sheet+music PDF link annotation
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/zadagimukase_gejatizorepal_romorebirezij_womitomikase.pdfIn PDF document text
    • http://sifasawiseziwi.iblogger.org/28668669606.pdfIn PDF document text
    • http://sujimelowakolop.medianewsonline.com/corazones_rojos_biografa_no_autorizada_de_los_prisioneros.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422163/normal_604dbce878268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501804/normal_601c995aa0713.pdfIn PDF document text
    • http://aires.fun/arrl_antenna_book_23cw0sq.pdfIn PDF document text
    • http://legko.travel/bambukat_full_movie_mp45bvmd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411921/normal_6034f586969ed.pdfIn PDF document text
    • http://kejubeluvobule.iblogger.org/torufedunuwojuvakidaxo.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/rejapegusa.pdfIn PDF document text
    • http://foyou.store/sugevuwafukixeseno12uqc.pdfIn PDF document text
    • http://lesantyqas.online/94539559756vfqsi.pdfIn PDF document text
    • http://mp4.design/wajiwuzolokikajepafre2cv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444353/normal_602760dad334c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_347332895bcc46d181ffd9453589cdfd.pdf?index=trueIn PDF document text
    • http://gotenekopibijo.epizy.com/82731645350.pdfIn PDF document text
    • http://kepebotu.rf.gd/the_complete_guide_to_business_process_management.pdfIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_c090663876f34affad274fb4ac646f36.pdf?index=trueIn PDF document text
    • https://db6a684c-bd73-4a61-997a-17040cc1d896.filesusr.com/ugd/bbbb20_84f10ec0555547b4897145a34b085f60.pdf?index=trueIn PDF document text
    • http://vawirir.atwebpages.com/dell_optiplex_7010_mini_tower_specs.pdfIn PDF document text
    • http://losaleludaguxes.rf.gd/99805162080.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5ED 5504 bytes
SHA-256: d370d55bb783d75e63708dc61f014f14bcca68925349b29a34b39a06a6b13b60
font_01_sfnt_off0000f870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 11620 bytes
SHA-256: e6c04e110f4478ba00f4eefca133347a8331e3fea47e8227005b00b60ea70501

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