Malicious PDF — malware analysis report

Static analysis result for SHA-256 f673683fb2898c8e…

MALICIOUS

PDF

75.6 KB Created: 2021-03-31 16:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 55965ecb247ee6e19f4b5f89d648c8e5 SHA-1: 5ffa0ea1ba96d8859b81124d480c01a8282a3c40 SHA-256: f673683fb2898c8e25936164ce8fd2742febe317b47fb66a818d947cd6c67149
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/award?keyword=cerfa+fa13+pdf PDF link annotation
    • http://lnstagram-verifedbadge.com/mitimajukaqd79j.pdfIn PDF document text
    • https://wetuwene.weebly.com/uploads/1/3/5/4/135400298/aa6d7547e97ac9.pdfIn PDF document text
    • https://saxurugilura.weebly.com/uploads/1/3/2/8/132814125/bc72e5e6af.pdfIn PDF document text
    • http://mugedly.xyz/what_is_the_weight_of_diesel_fuelwhqk5.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/exAgiih/hindu_devotional_songs_instrumental_ringtones_free_download.pdfIn PDF document text
    • https://beveroseve.weebly.com/uploads/1/3/5/3/135316004/gemugat_sidakuz.pdfIn PDF document text
    • https://cdn.sqhk.co/jivumigen/ihjivrl/1335487671.pdfIn PDF document text
    • http://watenaz.iblogger.org/55317741013.pdfIn PDF document text
    • http://familyit.pro/681586092364jcsw.pdfIn PDF document text
    • https://cdn.sqhk.co/gogefaman/jj2jhvc/bhoot_fm_2010_episode.pdfIn PDF document text
    • http://discount50.pro/kugudemocl5so.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/VXhb9ih/64055512368.pdfIn PDF document text
    • http://straponartist.com/how_to_renew_your_drivers_license_with_covid0hi3f.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/ifihpjj/navile.pdfIn PDF document text
    • https://tevidozeji.weebly.com/uploads/1/3/4/8/134887032/5096268.pdfIn PDF document text
    • http://bigakeka.iblogger.org/73289057388.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifijawubizomed.epizy.com/66796365571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/673bd620-ddcd-4447-b001-4bb2f7576640/lekitofexabufosavaji.pdfIn PDF document text
    • http://tuguwobafadurot.rf.gd/87985628289.pdfIn PDF document text
    • http://rugeritubaduw.epizy.com/amharic_traditional_music.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_f9cb61fa87df4d79b03fe591cd9d58c9.pdf?index=trueIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_bf31e3b2243e4f5092dddde94d9b8881.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b52691ca-a6d4-4285-aa48-c20a96342d83/16997400493.pdfIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_cee18bd4b12a4ab38ed6aebdf0d779c2.pdf?index=trueIn 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_off0000e6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E6 4948 bytes
SHA-256: f0516674d1407806dda0d136599717905a890b7198b66d006ba3e4fb068d3d38
font_01_sfnt_off0000f7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CD 12348 bytes
SHA-256: cd6e50de254e37599d4ec6931eb1b83dc9f9cc79bb0498d0e0b6deab3e190b6b

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