Malicious PDF — malware analysis report

Static analysis result for SHA-256 239e50e3205cfe7e…

MALICIOUS

PDF

74.5 KB Created: 2021-06-01 15:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 066f83089bd01e62bdf3b749db005e26 SHA-1: 2a17c53fdfe1ff6dfb5f2f882f7bdcf211705063 SHA-256: 239e50e3205cfe7e6850c4e331ae345b9369d5a691cad3c6c8370bc8cb318606
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 employing UTM parameters, indicative of a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://philabc.ru/pbw?utm_term=abcd+2+full+movie+download+in+hd+1080p+filmywap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370319/normal_606564441d97d.pdfIn PDF document text
    • https://mawafusujomadil.weebly.com/uploads/1/3/5/3/135351104/cdcec.pdfIn PDF document text
    • https://fagezatev.weebly.com/uploads/1/3/4/7/134711774/nativemaremaludumumi.pdfIn PDF document text
    • https://gegizadewer.weebly.com/uploads/1/3/1/4/131482997/vubekagudevok_xozuxizo_xurevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481513/normal_6012420892ebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452618/normal_6014b9fbadcf2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452392/normal_5feb55efab3f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425217/normal_5fd7d2adb537b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_606b2f59160c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454435/normal_5fcb9830f06e2.pdfIn PDF document text
    • https://tazeviguso.weebly.com/uploads/1/3/4/3/134339516/4932656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410186/normal_6053bd94f2630.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wixugigir.pbworks.com/w/file/fetch/144436830/44006686576.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/27827486479.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/60929617948.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/f/subway_surf_apk_indir_para_ve_anahtar_hilesi.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/izgi_film_indirme_program.pdfIn PDF document text
    • http://pagorevet.pbworks.com/w/file/fetch/144444246/fnaf_6_guide_steam.pdfIn PDF document text
    • http://xifilipisi.pbworks.com/w/file/fetch/144413262/38181078302.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/f/benim_hocam_yaynlar_yds-yksdil-ykdil_video_ders_notlar.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144424917/23559345681.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/f/psc_nursing_exam_questions_and_answers.pdfIn PDF document text
    • http://zogekinovag.pbworks.com/f/web_design_tutorial_for_beginners.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/144416898/what_does_widal_test_positive_mean.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_off0000e2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E4 6024 bytes
SHA-256: 455fcfe3818366c640be197cfccb64fb635277018c31ff877ed599b5d45f2982
font_01_sfnt_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 10732 bytes
SHA-256: 2fa76d82dbe069ee3ee92e9a92445141f23e8eaa2bf6523207269d170f0c96a6

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