Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c9a9d2bdae6ce7…

MALICIOUS

PDF

66.6 KB Created: 2021-06-14 04:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: efc54b3941e4dc07f8b27fd8aab2ba97 SHA-1: cd0ad712a3e5c94d39ea6e0bfad1295353e7ca80 SHA-256: c6c9a9d2bdae6ce78da75782c48059220b5b8c30690b0804a5cf3c3727dbc48d
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external links to potentially malicious or phishing content. The ML classifier and ClamAV also identified it as malicious. While no scripts were directly extracted, the presence of many external URLs suggests an intent to redirect users to malicious sites, likely as part of a phishing or SEO scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://pistant.ru/pbw?utm_term=how+to+send+video+links+on+discord PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480884/normal_60343bf6c8199.pdfIn PDF document text
    • https://voxonexagigiwal.weebly.com/uploads/1/3/5/3/135346225/xajoz-kewadapisub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471509/normal_604ade80ab925.pdfIn PDF document text
    • https://sukewemuzi.weebly.com/uploads/1/3/4/6/134668821/7752619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383471/normal_6062d1337a13a.pdfIn PDF document text
    • https://povuwexaruvave.weebly.com/uploads/1/3/4/8/134867965/guvekiva-susar-kubolumijosaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_602d6fd3dccf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424933/normal_601d3b3b2729a.pdfIn PDF document text
    • https://bepagiji.weebly.com/uploads/1/3/4/3/134352373/nugedasedakip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_605063ef8c0f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446650/normal_5fdba6064b2aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465393/normal_6027c2beadafa.pdfIn PDF document text
    • https://bupitubijas.weebly.com/uploads/1/3/4/0/134040922/8049874.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4455179/normal_60affdf2e6911.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/405ad389-0ec4-4340-a4ef-c4d69c6eee12/how_much_does_an_anesthesiologist_make_in_residency.pdfIn PDF document text
    • http://rukuvekuke.pbworks.com/w/file/fetch/145076775/chal_mera_putt_2_full_movie_todaypk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a7c6dc5-56b6-44ac-b2cf-a2a2e5556c8d/pafowi.pdfIn PDF document text
    • http://zatesil.pbworks.com/w/file/fetch/144993069/lebazebunagemofopix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b284476-47af-42d4-a16e-7e8995b212e7/ethical_problem_solving_model_in_social_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a6f2724-247b-43de-a9c1-e38f731a689f/setemigudiguzij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/946edb71-2afe-4bb3-af26-181e8038a56c/3020937054.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/w/file/fetch/144481131/korasutudofen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633ed4da-394c-4225-bdf5-b609aa568f8c/libaxola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f6dcb1a-3d44-4aff-8418-be41dc46e12c/research_proposal_sample_paper_in_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac1dfc51-be61-423e-b9fb-33037b0d9cdd/how_to_change_the_text_size_on_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e3ad95-99ce-4575-ae41-1de7add7cbac/95494163954.pdfIn PDF document text
    • http://sebevowan.pbworks.com/f/98609619516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c60243-94e8-44de-a6b9-e74b3c3e6d6f/how_do_i_reset_a_lg_tracfone.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_off0000cadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADC 4900 bytes
SHA-256: 4734dd3debc6c1aafb2697d418c01f5586170029ab393ee879ba2e94614deffe
font_01_sfnt_off0000dbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAE 9720 bytes
SHA-256: a2e4857ab197716c613171b30f259dce9d47af3c1867568514ec9e75e048517f

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