Malicious PDF — malware analysis report

Static analysis result for SHA-256 689545c8351a212d…

MALICIOUS

PDF

75.7 KB Created: 2021-03-16 18:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ed7b8e75d5fd5c26b698df2c25f9f21c SHA-1: 50a7818e9ebaf008926955627790c40a3a3426d2 SHA-256: 689545c8351a212d8d12a68e2e8e5712939245b3e50c9b9741c975d8a0b597ec
186 Risk Score

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 0.9993

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://seumenha.ru/wix?keyword=sims+snowboard+boots+size+chart PDF link annotation
    • https://jogabaxeke.weebly.com/uploads/1/3/4/7/134704809/57ec86.pdfIn PDF document text
    • https://bodukomemewasug.weebly.com/uploads/1/3/4/7/134701633/tasoloxujajado-banijenut-fejasonikip.pdfIn PDF document text
    • https://tomasuniraruz.weebly.com/uploads/1/3/5/3/135392941/7777903.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/jihIIje/74589123073.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/DgfgjWg/retro_classic_games_emulator_apk.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/deseko_vezijewave_vefunika_bojonuki.pdfIn PDF document text
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/b22c9dc0.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/fRBCAgi/48688377772.pdfIn PDF document text
    • https://zegepami.weebly.com/uploads/1/3/0/8/130874110/waxur.pdfIn PDF document text
    • https://vipapixamez.weebly.com/uploads/1/3/0/8/130814430/tovovorebibijo-xogipusesufev-zekavinofi-nuxosipaxerone.pdfIn PDF document text
    • https://zepiwifolu.weebly.com/uploads/1/3/5/9/135965208/8511892.pdfIn PDF document text
    • https://vabadagijuruka.weebly.com/uploads/1/3/1/8/131856539/3882279.pdfIn PDF document text
    • https://juguxusomusivu.weebly.com/uploads/1/3/5/3/135327365/8909776.pdfIn PDF document text
    • https://wadewasugidaf.weebly.com/uploads/1/3/0/7/130775384/e73db156.pdfIn PDF document text
    • https://cdn.sqhk.co/lasijutag/khamhad/84769189735.pdfIn PDF document text
    • https://barurusijibipek.weebly.com/uploads/1/3/0/7/130740419/e3b37225d65a0.pdfIn PDF document text
    • https://tujalulu.weebly.com/uploads/1/3/4/3/134382228/ca0f13ce84f2b.pdfIn PDF document text
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/suzewumaxo-vilanugifejam-lesalanez.pdfIn PDF document text
    • https://mumanewuneju.weebly.com/uploads/1/3/2/7/132712109/0cf28fa4a3f268e.pdfIn PDF document text
    • https://zudamuberul.weebly.com/uploads/1/3/4/8/134854759/8874381.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/zasavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/89239195754.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/toronto_alexithymia_scale_tas-_20_questionnaire.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_off0000eb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5B 5532 bytes
SHA-256: 7a101ae7ccc2c23d0431f19cf97e36f382f089687dc97c36872a70bf3dec3c2a
font_01_sfnt_off0000fe13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE13 10292 bytes
SHA-256: 03b4980fa1230cdeb5ee7c2b02f5f3d7ab1bfcd31dab3143b14951b31034b424

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