Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e199e4f9fbf348…

MALICIOUS

PDF

77.0 KB Created: 2021-03-18 22:07:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 80fb114fcee369e35d2dbc5bc9f7f218 SHA-1: af9f19ff3486ba6638cbc59121396e186178f2c5 SHA-256: 72e199e4f9fbf3481c3b8e31f1242ec5e7f8efabb2252c13cb2d34c547147e0b
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to 'Marshall mcluhan quotes on media' to direct users to the malicious domain fokemale.ru. No scripts were extracted, but the overall structure and heuristics indicate a phishing attempt via a malicious PDF attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/aws?utm_term=marshall+mcluhan+quotes+on+media PDF link annotation
    • https://nalavawe.weebly.com/uploads/1/3/3/9/133997318/dojuwutenudubuzuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495551/normal_601430f45c4b7.pdfIn PDF document text
    • http://tunabamilusi.mypressonline.com/the_art_of_the_pitch_peter_coughter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405922/normal_604ac7a393a99.pdfIn PDF document text
    • https://bagetakibejo.weebly.com/uploads/1/3/1/8/131871627/34e8dbb602.pdfIn PDF document text
    • http://fejugutafilevin.scienceontheweb.net/nutelabito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403117/normal_603b3b562bd84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fde5dec8afb7.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/piwanisaj/97559668646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3daa573e-6fec-4616-8c55-6292e632960e/kesupifatesewog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5675bdfc-a8da-4c59-a64c-32eb5a9fee00/sadisikarinujinasegusenom.pdfIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_758fc5dfb4bd488d9b1c75a1c94528d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/autotransformer_starter_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/80632632649.pdfIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_be298644bbc5487d8778c7b1ffe23a59.pdf?index=trueIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_055d9488016741fcb212742f72365fb9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4430192-812f-41eb-9629-245fd3a9f9eb/23431625277.pdfIn PDF document text
    • http://jowokepo.atwebpages.com/esperanza_rising_book_lexile_level.pdfIn PDF document text
    • https://245df057-3761-468b-8bc4-2c9c6734f7c7.filesusr.com/ugd/06c8e1_806c2fa0c9ba49479ff34617805df5a1.pdf?index=trueIn PDF document text
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_916edda81a5342e791e130fe75342bf8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/55202ff6-7d28-4153-ad83-4f591d60de06/14454372257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6de7c44-b320-4a17-a3d0-c6e4dec36a05/paragijonawopapixomokori.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/mendelian_genetics_lab_report.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_off0000f204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF204 5308 bytes
SHA-256: 11879ee1e2a37336ba37a01f9f0c7f1f7beac177ddc98fe8bf20f42a7dd2080c
font_01_sfnt_off000103ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 10364 bytes
SHA-256: 8c4bba3fb4620aea74b92034c73d10aa1e60b7b8dad4386b3a4422c11cf9a7d2