Malicious PDF — malware analysis report

Static analysis result for SHA-256 306ef06287480448…

MALICIOUS

PDF

77.1 KB Created: 2021-03-07 16:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4d4e94e94e0057355ffd700cdb370f0f SHA-1: 2f9ce13f51f392ebe04cf504a8606bec73a008e2 SHA-256: 306ef06287480448e5095760e23d60cbb394117104c21c4f642100aedce9525d
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary malicious URL identified is https://botokaw.ru/award?keyword=free+no+carb+meal+plan, which is likely used to redirect users to malicious content or phishing pages.

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://botokaw.ru/award?keyword=free+no+carb+meal+plan PDF link annotation
    • https://cdn.sqhk.co/jujifefa/W8ghhcq/1291719134.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/wicYjcR/73347384412.pdfIn PDF document text
    • https://zawamobapuve.weebly.com/uploads/1/3/5/3/135383520/midepunazegalajeg.pdfIn PDF document text
    • https://topuzuxet.weebly.com/uploads/1/3/0/7/130739133/48987.pdfIn PDF document text
    • https://xugugizebe.weebly.com/uploads/1/3/1/4/131482894/2784093.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/shgieGs/77112397978.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_695a0535a3ba45b8a5b5c3d082356b2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32585278-83de-4028-816c-67a49edbeb19/65567614159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cdad03e-f1c2-401a-9a3c-d6534d5ee18a/rififibojugitojukula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f5f3049-69af-40c3-8024-4542e11fa7d0/pivuxiferarifesujemipag.pdfIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_144ff270993f4caca9d20eec24c304bd.pdf?index=trueIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_6d00c9f4e6eb4ecfb7dc4fbf5c342b12.pdf?index=trueIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_c2af0f6ff1da4cfc9076e2d7b87eebaa.pdf?index=trueIn PDF document text
    • http://kivaxabobusited.epizy.com/stuart_hall_representation__the_media_summary.pdfIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_bb21b598a46e4805a01ce118183f0065.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba8292c-400d-4de0-8513-13c6d9b431f3/bomibagumizagaxowadof.pdfIn PDF document text
    • https://1f58c142-9def-43e8-a90f-cd2f6aa2bdbf.filesusr.com/ugd/bae363_4028d054106c49e281f5d605bca59113.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/890d3b2a-5204-4bcf-9098-4a5b15a751ca/pathfinder_kingmaker_first_world_portal.pdfIn PDF document text
    • http://rewelopax.rf.gd/brother_dsmobile_720d_error_code_2019.pdfIn PDF document text
    • http://mufogedone.epizy.com/alternatives_to_google_forms_free.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_off0000efe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE4 4996 bytes
SHA-256: bb4c09b23f63d208961ba6f0d020fb174056c7219d28428456897e4cb1d1c434
font_01_sfnt_off000100c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C9 12024 bytes
SHA-256: b621d9856e2b686c4292274b688fedd41df8f4674ff9322f8751ca095df4d55d