Malicious PDF — malware analysis report

Static analysis result for SHA-256 6214afbbb8ad607b…

MALICIOUS

PDF

80.2 KB Created: 2021-04-17 05:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5cc264299e8a53e2691ad4405fbef7d9 SHA-1: e4facf5e77d1a8a3f428ce7039369c3f75f6190a SHA-256: 6214afbbb8ad607b1332d21611ba9fe091092c4f61b3062ce55aa34c433c54d4
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV specifically flagging it as 'Pdf.Phishing.Trojan'. The presence of numerous external URLs suggests a phishing or content distribution scheme, potentially leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=what+does+wine+signify+in+the+bible PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409797/normal_601ad9899c3cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454300/normal_604cb36d86012.pdfIn PDF document text
    • https://cdn.sqhk.co/bumajanivosi/jgjpjd0/47751123766.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/DhgGEij/pitutatajiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_5fe662bf74991.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/08jicYU/rirazan.pdfIn PDF document text
    • http://ruzeviliv.iblogger.org/40078480992.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/hjgggcp/xcraft_xplusone_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470402/normal_5fe73a5c42e54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_605c7499e7c5d.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/jeicgeD/dijudekopuwapibedatalej.pdfIn PDF document text
    • https://cdn.sqhk.co/pufojoloz/cDWnibh/wexabesefulukus.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/gXqNFgc/best_iphone_12_mini_deals_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/lazimafuxuxi/3H3fjco/medamuwusajed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426815/normal_5fdde98e68194.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vokozebutiri.rf.gd/zabewexuz.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_6f2d8e9d11314cfb964f55845c5f7630.pdf?index=trueIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_9d3dc1b8053846fd99f81f5f65ba0379.pdf?index=trueIn PDF document text
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_9786c12e6b1a49d883616d47c4fcab1e.pdf?index=trueIn 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_off0000fa50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA50 5420 bytes
SHA-256: 61cb05c51b240604bb32c3ed7a3320c5a077cf78a3ccaa50c89530bc6eaf3537
font_01_sfnt_off00010ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE1 10908 bytes
SHA-256: 066c3660f0ce9c36575bcc1b1de905172800d68272dc814cd1e246221433bf70

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