Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d239235b958f7e…

MALICIOUS

PDF

93.0 KB Created: 2021-05-06 10:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 062a6f0c201117245cfc646502e1046a SHA-1: 64595f2127f92a0965e23d33661b27cceb6729ae SHA-256: f0d239235b958f7e3a3b072f79cef5415c70cbe7f03076a12fc659b3723474c3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a mass external link farm, with one URL directly referencing a search query for resume keywords, suggesting a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were extracted, the PDF structure and embedded URLs point towards a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/strik?utm_term=what+are+power+words+in+a+resume PDF link annotation
    • https://cdn.sqhk.co/vijamabaf/jbs5jif/airbrush_easy_photo_editor_full.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_60644d4f18c17.pdfIn PDF document text
    • https://bifutizuwosedi.weebly.com/uploads/1/3/4/6/134645412/luzuraliluful_xejurojejikovir_teref.pdfIn PDF document text
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/wugari.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxojusib/hIhbjat/29992209729.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/jghgjh2/kesupivikipujuzat.pdfIn PDF document text
    • https://neposuxanu.weebly.com/uploads/1/3/0/7/130740617/8765844.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/iyjePsn/skyrock_radio_direct_frequence_bordeaux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377704/normal_60059449d7c22.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/c3ab927e9986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417652/normal_5fd88225e8886.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479222/normal_5ffaa19231708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_5fe998e30155c.pdfIn PDF document text
    • https://cdn.sqhk.co/xarupozikala/a1vIjjq/relufomatib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_65fc316b6cea4712a0c9efa2fbbb7b1d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/946a439d-c349-4b57-b623-e779a865cca2/67998975262.pdfIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_8988706e90cd436db4734059b0fbea8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb19cc0c-3a7c-44ed-924e-fca8444e6d7a/kangertech_top_evod_starter_kit.pdfIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_81a21dcf7c1c4adcafc28de38e6dde95.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_89ad6199005b48f49ecca2dcc5d7e9c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/414f338f-8423-4f37-ba2e-59971df5d427/89001855538.pdfIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_8bd83f2e5d1d46b08cdc55ac49c61aac.pdf?index=trueIn PDF document text
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_b122471272164600923a47d6ce0d2853.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_e54f316caca341b2ad84fa7f9705a347.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b773481d-d29f-4868-bb11-dd71b22c673c/duvifebinidafukorujawifin.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_off00012cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB1 5272 bytes
SHA-256: fab90d7510e7945f2b98e00e81d517a9b72fc5411677f2f4a292d986509e9c11
font_01_sfnt_off00013e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8C 11328 bytes
SHA-256: 9a8d7bdd502907bb199527367e26320f9e8557a119a1c6db26e0526d56db4f0b

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