Malicious PDF — malware analysis report

Static analysis result for SHA-256 84edea4465b40a9d…

MALICIOUS

PDF

65.3 KB Created: 2021-02-11 04:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: da7643e01d0fb36f237e75837cfbd642 SHA-1: 276a2cc81a1561d1466cfd390b13c655e0608621 SHA-256: 84edea4465b40a9d73c679a460414b3ffc5da74a0cd6ad791bfa4625d184adfc
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and Weebly hosting, indicating a link farm or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious content or phishing sites.

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://maypoin.ru/123?utm_term=46re+rebuild+manual+pdf PDF link annotation
    • https://gobodozi.weebly.com/uploads/1/3/1/3/131398455/dabunebajivupadamupi.pdfIn PDF document text
    • http://p-kavkaza.ru/marksmanship_pvp_guide_bfavuqfi.pdfIn PDF document text
    • https://biruwilajefi.weebly.com/uploads/1/3/4/6/134651793/dipazeromumixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404738/normal_5fdb1fe0af2c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497688/normal_601fa8ce2e6d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_600f93583dc51.pdfIn PDF document text
    • https://nibonitet.weebly.com/uploads/1/3/0/7/130776737/4517203.pdfIn PDF document text
    • http://topsalon.xyz/cork_board_sheets_1_inch_thick9zvv1.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/wixafazaxakikixm6625.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/woxalojurivir.pdfIn PDF document text
    • https://nojamatisi.weebly.com/uploads/1/3/1/3/131384142/lubule.pdfIn PDF document text
    • https://fanuterose.weebly.com/uploads/1/3/3/9/133999321/7081973.pdfIn PDF document text
    • https://musegozaxugovu.weebly.com/uploads/1/3/0/8/130873783/1668701.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379370/normal_5fc79dc976730.pdfIn PDF document text
    • http://naturaleone.space/merriam_webster_geographical_dictionary9cumv.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/wudibirewuduto/vafami.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/speak_out_intermediate_answer_key.pdfIn PDF document text
    • http://pagujuropiwadiv.rf.gd/rpg_maker_vx_ace_free.pdfIn PDF document text
    • http://zotawof.rf.gd/tulerutajosex.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_off0000c39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39F 5296 bytes
SHA-256: 2a20167f22fb0aa7bc2172be655e8c36879df273228504d517a57991b2a5b615
font_01_sfnt_off0000d586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD586 10080 bytes
SHA-256: 5b50ff39c531fe84023871f913ceafe3dedf4b8d3d370e0a56ddd514e7f53176

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