Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf62bf652b42936…

MALICIOUS

PDF

76.1 KB Created: 2021-03-09 09:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2847071e2221b943aba41e9958bc64e7 SHA-1: f629aeec831c26e44f8e8c65eada7478e6e15de2 SHA-256: baf62bf652b42936c3ae77aaf63502dc448e8ed595c4c816565b812f269743de
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://jottigo.ru/award?keyword=cp+plus+camera+price+list+pdf+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417807/normal_600b79b336ecf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424996/normal_5ff4f5ce8d030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_603efe89ac639.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470019/normal_5ff533a91c599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5fd34b78eca8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482631/normal_60257bd6c3b52.pdfIn PDF document text
    • http://zuferiwabofeg.22web.org/19883938216.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/bederonega.pdfIn PDF document text
    • https://sotemukolewidiv.weebly.com/uploads/1/3/4/6/134660154/dibesomubise_narunisireza_muwumegesomax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406820/normal_5fe48bf63fe91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449779/normal_5ff14b7e74c56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://safodur.epizy.com/arris_tg862_router_login.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/88222535592.pdfIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_e2bd9ef0809f4a48971ecda2150ed75a.pdf?index=trueIn PDF document text
    • http://topuwagib.epizy.com/karthik_calling_karthik_720p_movie.pdfIn PDF document text
    • http://kixukad.epizy.com/ownership_structure_and_corporate_performance_in_japan.pdfIn PDF document text
    • http://zoxokukazo.epizy.com/43871762209.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/mystic_messenger_email_guide_zen_route.pdfIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_644b4201ca0844559dbceea28f7f1ade.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/bogoripuzitobobuv.pdfIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_7ac38f1623e346c8924218fc28e14cf6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/golixewunujipog.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_off0000edc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC9 5480 bytes
SHA-256: a8a8039e6a2c33ce7c3ef094d5ebceb7af0be5715b0ad2e74579598bedcd37e4
font_01_sfnt_off00010055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 10148 bytes
SHA-256: aa2afcfdfe42c6e416b50fabc754a7a526d75fe0a1fe2fdfc9887bfb43c5d537

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