Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c20c5e0012afd8…

MALICIOUS

PDF

78.2 KB Created: 2021-03-06 09:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 098e099d5b62fb1a0fa039c8a3984eeb SHA-1: 77521368f9b02b13639a95f2eee78768950655e7 SHA-256: d8c20c5e0012afd88f551b473221affa980ea1c2edbee6da45bd4b2da45c85d2
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing numerous external links, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/aws?utm_term=what+are+the+environmental+impacts+of+economic+development+in+nigeria PDF link annotation
    • http://copyrights-notices-helps.com/ver_fox_sports_mexico_en_vivo_onlinem49yp.pdfIn PDF document text
    • http://tgesheff.xyz/wijekamaroxix8ltg.pdfIn PDF document text
    • http://vas-rem.ru/job_full_form_bengaliizhig.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/jiA8hdN/dasalorivemurijedakutaw.pdfIn PDF document text
    • https://kitabenulo.weebly.com/uploads/1/3/0/9/130969432/7379427.pdfIn PDF document text
    • https://duxizesojisuvab.weebly.com/uploads/1/3/5/3/135327590/d1cbe393.pdfIn PDF document text
    • http://itawegan.space/16944796081cfnrb.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/vhdJGge/free_download_uc_browser_for_pc_filehippo.pdfIn PDF document text
    • http://repair-foto.ru/7480043690936ac6.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/Ipogdie/jolly_phonics_lessons_app.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/rukovumo-wedofu-degapofodepo.pdfIn PDF document text
    • https://nenawobu.weebly.com/uploads/1/3/4/1/134131353/cdf59f573f74.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/bABwRw1/42587057520.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wetipuvixozaduv.epizy.com/how_to_start_a_indoor_sports_complex.pdfIn PDF document text
    • http://nolumer.rf.gd/87118596586.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_c6865ef19ad84aad82b07d27ed3c96ba.pdf?index=trueIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_fa9e2cad70c54448b2e623abe1a9dee1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/code_bancaire_algerien.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_96675aeec90547d296bbddf2ffc9ad5a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/21499255285.pdfIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_8d6c708fa67e49238733e9428dbfa6af.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_off0000efd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD1 5644 bytes
SHA-256: 1c069e696986d6ef2e74a84961efba2c2f3b37ad46adf930448fa190d9ae96b8
font_01_sfnt_off000102e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E5 11828 bytes
SHA-256: 69812cad5db3533a488e45591dfb9512c8f2930bf4dc766c4c20c7a2cfece451

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