Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab834230813d6632…

MALICIOUS

PDF

74.3 KB Created: 2021-03-02 04:56:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 206d5ce1a53015479ab6c68ad97ddb85 SHA-1: e8f710fe76c0093111d0e74f2df1bc11ec5f2a2e SHA-256: ab834230813d6632da97ed169ca220866d42c47fe2b7b133c40bd326eae8dce0
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to legal agreements and software downloads, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=share+purchase+agreement+pdf+uk PDF link annotation
    • https://cdn.sqhk.co/dodirorip/idnjkcS/pc_games_download_free_windows_7_offline_shooting.pdfIn PDF document text
    • https://mofesotuju.weebly.com/uploads/1/3/4/7/134712265/8978474.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/lopomuzekafi.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/80233669826.pdfIn PDF document text
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/9379143.pdfIn PDF document text
    • http://latitekiwa.scienceontheweb.net/tom_clancy_the_division_ps4_cheats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_6032844e2611b.pdfIn PDF document text
    • https://cdn.sqhk.co/bimafaboxugu/ixgggfS/royal_caribbean_cruises_2020_alaska.pdfIn PDF document text
    • http://lezobul.medianewsonline.com/the_time_travelers_wife_book_chapter_summaries.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460251/normal_60337f2c8a9cf.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/icHSVgj/fortnite_dark_legends_bundle_price.pdfIn PDF document text
    • https://tulugawaluga.weebly.com/uploads/1/3/0/9/130969515/1434808.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380393/normal_5fd0637c795c0.pdfIn PDF document text
    • https://cdn.sqhk.co/nudotunaza/Ehciggd/bpi_sales_management_trainee_salary.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
    • http://gatovon.rf.gd/osrs_ankou_cannon_guide.pdfIn PDF document text
    • http://buzanuziti.myartsonline.com/76278540957.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/gigirogu.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_off0000d930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD930 5428 bytes
SHA-256: 33cca4345cd5dd4f10f7779ce4a71120e189fd7e33cbb3720e83817f047c6cd2
font_01_sfnt_off0000eb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7A 10160 bytes
SHA-256: 638154c3011ab2f00feb8bf3d7686bfc85b30ba8207a37ed07457d557120e661
font_02_sfnt_off00010e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E43 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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