Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcad9b022bd1305…

MALICIOUS

PDF

50.6 KB Created: 2021-05-14 08:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 636ac6cc4854a9ea440de6a465be3d1d SHA-1: ef256502daa8ad4d2de4a7d60d8a75f8c6c25fd8 SHA-256: 2bcad9b022bd1305db2899e74fcc2511327bfdc539331bd115c7d426694f4f1f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7523

Heuristics 5

  • 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
  • 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://zajinet.ru/strik?utm_term=a+touch+of+class+movie PDF link annotation
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/dawuze.pdfIn PDF document text
    • http://lulizukudomiz.scienceontheweb.net/acronyms_and_synonyms.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/frigidaire_dehumidifier_repair_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/abmiejF/golunujum.pdfIn PDF document text
    • http://pozufopajosel.mypressonline.com/rabodanetaxomenatakil.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/5826444.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/67974125806.pdfIn PDF document text
    • https://soberonapi.weebly.com/uploads/1/3/2/6/132681790/dcf0e20bb6.pdfIn PDF document text
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/xozikapololed-tajub.pdfIn PDF document text
    • https://cdn.sqhk.co/kirovuwuvo/hcjaykJ/69335652749.pdfIn PDF document text
    • https://cdn.sqhk.co/toviranevu/d5gfljb/39130066596.pdfIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_d2d6f7cad9c7450ab86207c4766dbdb1.pdf?index=trueIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_42f2f07ca116460a97f10776548cbb82.pdf?index=trueIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_bdb467bb98ec4205b3e6a919644aa08d.pdf?index=trueIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_141580fc49e14c5185b8d2c32894820d.pdf?index=trueIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_5e8e3bc2072c45a1947d3e8fdab44218.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2db4d1c-4d69-491f-9752-4fd51f1ea2d8/dipopelabosiwiz.pdfIn PDF document text
    • https://7322f44d-5cb7-45f5-8521-a79093f6ce74.filesusr.com/ugd/dd0890_2006f06c09da41e3a400cdf462e0b206.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/519e8194-2aa8-4ed5-aa16-bfc6bc641829/mpc_essentials_user_guide_franais.pdfIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_a93a466a4f9b4232b4f4e995ec533ec6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/15932d99-2e94-4296-a766-40fd91166837/mivewifimimuduku.pdfIn PDF document text

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