Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e475916de4da3c8…

MALICIOUS

PDF

64.6 KB Created: 2021-02-07 00:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 306fc5af1ea31e496814a342ca6f2441 SHA-1: 6fadcda078165fed36ed071c6ed5cc99b8e2a2a8 SHA-256: 1e475916de4da3c8b415767aca54ef809b426ace072455592b7224841b7e72cb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to obscure the ultimate destination. Heuristics indicate this PDF is a link farm on disposable hosting, with a high ML score and ClamAV detection confirming its malicious nature. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=dragon+ball+pdf+download PDF link annotation
    • https://cdn.sqhk.co/diwiporeb/gcny0jg/wamogasikise.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393901/normal_5febdea4b285a.pdfIn PDF document text
    • http://wiinorama.website/rawofoturemizivagoxumpcvu.pdfIn PDF document text
    • http://vasazuruxu.iblogger.org/juligazaxuvejam.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/adjcugf/best_cross_stitch_embroidery_thread.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485569/normal_5fdaca92f375a.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/UhjYtmX/3965639806.pdfIn PDF document text
    • http://xeeewq.xyz/halo_cops_and_robberscpsnb.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/hitWjbE/brain_balance_reviews_tampa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5fe8fcf346b2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5fe6d020d2535.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5ffff078760c4.pdfIn PDF document text
    • http://citrus-fruit.space/62756346930ndir7.pdfIn PDF document text
    • http://azalea.store/bts_ly_answer_album_buy8hgyo.pdfIn PDF document text
    • https://cdn.sqhk.co/lawikuto/ajbm5ie/learn_python_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_5fdb2f2c4bf35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B5 5260 bytes
SHA-256: df5f327bd0ab3e0fd119f2f97fed72e5a02016c31aae09cec918a43168c10ceb
font_01_sfnt_off0000d2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BD 10592 bytes
SHA-256: 0bafaf20c560dcf479de67c87e889260c5f4d5aa54d55baa9315f289741f43a2

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