Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2f56d62aa86a60…

MALICIOUS

PDF

109.1 KB Created: 2021-03-27 16:19:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: adfebce891716861867731bdc2364cf3 SHA-1: 5991cc8de92b6f809cedc7c38cf21dbd7d12d4b2 SHA-256: 1b2f56d62aa86a606f8eabff56019ebdea5ad3da85ceaa54bbddf58d7cda6b2f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, suggesting it functions as a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to the document's structure being designed to host many links on disposable domains, further supporting its use in malicious campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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=berger+paints+annual+report+pdf PDF link annotation
    • http://nesobaka9.xyz/ingles_sin_barreras_disney_precio6f6o1.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzabajixiw/jdeOchg/zikivola.pdfIn PDF document text
    • https://cdn.sqhk.co/newupulig/LheZhjV/sabumotat.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/bgeMjgw/happy_street_magical_gem_a.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/geTjaoc/wupixaganadaxonirowu.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/bzwiiHN/93544338357.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/PhdieEi/7437988168.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/jiZlLje/79613108504.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/5geKhfS/1621928188.pdfIn PDF document text
    • https://cdn.sqhk.co/tabakotodi/jgwIVhj/cisco_webex_desktop_app.pdfIn PDF document text
    • http://wegansit.space/healthy_and_unhealthy_food_worksheets4bxdp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492253/normal_5ffe50b2ef74a.pdfIn PDF document text
    • http://copyright-notice-ig.com/508021107062mee7.pdfIn PDF document text
    • http://getyourscore.info/buzadu42rbv.pdfIn PDF document text
    • https://cdn.sqhk.co/nanijamu/F51JNgf/quotation_marks_exercises_with_answers.pdfIn PDF document text
    • http://themarkuzmusic.com/5054477304724086.pdfIn PDF document text
    • https://cdn.sqhk.co/kefivaxepaj/Zmifgjh/45933285253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459631/normal_6030446057e48.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/ztHGie0/the_walking_dead_season_1_telltale_review.pdfIn PDF document text
    • https://cdn.sqhk.co/koletexun/MHjfYfE/65296907234.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/LtIjbIv/83742640603.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449771/normal_5ff0431bed237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sazomo/vusumagoxopijifu.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/2021_pc_games_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/windows_10_1809_update_assistant.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_off00016ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BA5 5260 bytes
SHA-256: 9fa6ee08dbbfaed69a03e38c27d6691e2887aee005b4c5515532c94fb55283d9
font_01_sfnt_off00017d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D98 11464 bytes
SHA-256: feee278f522c6a7af862d407b0197d73ee6c4ab589599fdbed4196715ac3100e

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