Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb2e6358f281ad9…

MALICIOUS

PDF

74.1 KB Created: 2021-03-08 12:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8fd75f739b98f12d2d16fa6c44f2744a SHA-1: 845e045e790d52a0e4de2b2467c6a398651b3070 SHA-256: fcb2e6358f281ad957c0849fb80e6415b73f497b8574d7c090e4d6ce183b79f3
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam tactic. One of the primary external URIs, 'https://soxebez.ru/award?keyword=atkins+fisicoquimica+pdf+descargar', is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the overall structure and heuristics point to a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/award?keyword=atkins+fisicoquimica+pdf+descargar PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5ff0b5046f3bb.pdfIn PDF document text
    • https://bowiromifax.weebly.com/uploads/1/3/4/6/134613330/lonofew-goguf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454184/normal_6045e689c705b.pdfIn PDF document text
    • https://wikusujuvi.weebly.com/uploads/1/3/1/4/131406665/5541950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386849/normal_601fbc432246c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_daabe4ffc63640a680d46fce00f2c273.pdf?index=trueIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_a0b58cb098114b2cbfff51483dc087c1.pdf?index=trueIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_15ca598769684501a825ade2e18cf672.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/blackmagic_design_atem_mini_pro_4_hdmi_live_production_switcher.pdfIn PDF document text
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_669a8a05610440829068c4f6cdff2b32.pdf?index=trueIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_bea3770042484784903270ece490386a.pdf?index=trueIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_f56e8fd85ae04462a170adba338efd23.pdf?index=trueIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_c41b8f6b23464d3b98fef8af61356539.pdf?index=trueIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_26b7eab2b6e54eb0bedc7a22a884396d.pdf?index=trueIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_755fcbef7eb04ecd86a0fbf9dc479daf.pdf?index=trueIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_303e6b52cc4243afadb9d4f83c9d7d75.pdf?index=trueIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_d71928c1cc2046c5a4156dc34bf2b129.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/regovadeje/call_of_duty_black_ops_2_save_editor_xbox_360_iso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD892 5504 bytes
SHA-256: 0b542ecdafc25a587b7dfac0fc2c43aa8e69111c5d8eb99dfbb0180ab46ff625
font_01_sfnt_off0000eb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 9948 bytes
SHA-256: 4be15c86317201ad1510a96f17ff876fe52c4e7197250c97c98d38a41bae5983
font_02_sfnt_off00010d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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