Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b14b49bc6619c50…

MALICIOUS

PDF

70.9 KB Created: 2021-06-02 11:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 180a4ff19a9e4fabe79f26021cdb3e7c SHA-1: 81e6fe6dfb6d009d00c3c74fabba600a9b8cf6ea SHA-256: 1b14b49bc6619c5024e595d6a7d88bec39cf528b008a5b9213edb33c1dd0c851
186 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. 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 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://oniceh.ru/pbw?utm_term=wolf+online+super+mod+apk+download PDF link annotation
    • https://napemoxirakula.weebly.com/uploads/1/3/4/6/134682748/9ee27e053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_605c85b4df2f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_602520cb252ae.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4375077/normal_60aff220732e5.pdfIn PDF document text
    • https://buvujufa.weebly.com/uploads/1/3/1/3/131379824/terubumifok.pdfIn PDF document text
    • https://juramezuvuro.weebly.com/uploads/1/3/5/9/135956704/fegukelusinusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5fd199bbaa231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_605dc1fa66c73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_606d349e6e91e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_60376062dbdcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zelovoguvunu.pbworks.com/f/how_to_sync_jam_2_wireless_speakers_together.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/pdf_to_word_online_free_i_love.pdfIn PDF document text
    • http://pulixojesu.pbworks.com/f/casper_chy_driver_indir.pdfIn PDF document text
    • http://guronavageba.pbworks.com/f/kowawubuxivesavimexojuto.pdfIn PDF document text
    • http://mepijewaj.pbworks.com/w/file/fetch/144426642/77595270478.pdfIn PDF document text
    • http://risoxef.pbworks.com/f/xifelenevupasekosubezado.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144420405/jurotekukuwozavigawu.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/w/file/fetch/144492501/razubelelovalijemaxifa.pdfIn PDF document text
    • http://depowota.pbworks.com/f/dejadujezamibumoseni.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_off0000d8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BD 5356 bytes
SHA-256: 3958907a82359011151781b6a1d18687742cb662a6c138877cf167ccfab23640
font_01_sfnt_off0000eaf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF9 10180 bytes
SHA-256: ece72dfbdb6d74fb8e6126abab846fb0d2070f80465df766d2d92953233d001b

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