Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6720ce0006bd6c…

MALICIOUS

PDF

79.7 KB Created: 2021-06-11 22:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 214744a6aa218e00d418b14f29c89330 SHA-1: 656cd92b0846646ad6e28606f0b7490626da1286 SHA-256: 6f6720ce0006bd6cfb2ec01f0c0313fef1cea2f1315fc1baa189ddbc7d5e3575
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many of which are associated with disposable hosting and redirectors, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious lure, likely aiming to redirect users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://oniceh.ru/pbw?utm_term=the+croods+new+age+123movies PDF link annotation
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/kujegezafa_xefuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451228/normal_60c371a999fd9.pdfIn PDF document text
    • https://lijemokuw.weebly.com/uploads/1/3/4/8/134853622/5faf1007f693ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391308/normal_5fcb26dd63528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460063/normal_600f2229e427d.pdfIn PDF document text
    • https://xupotigoxurope.weebly.com/uploads/1/3/4/6/134657266/d8da3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_60c28c920b73b.pdfIn PDF document text
    • https://gosupafitowiru.weebly.com/uploads/1/3/4/6/134673249/tumir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450641/normal_602f39000c88d.pdfIn PDF document text
    • https://gorijifezavu.weebly.com/uploads/1/3/4/5/134502749/bexizas-mubolaku-nupanoxebovese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443810/normal_5fd3b66ba7876.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liwuvedesisu.pbworks.com/f/is_indian_yogurt_keto.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/w/file/fetch/144693024/school_of_dragons_gem_hack_2020.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/f/grille_salaire_secrtaire_mdicale_2020_fonction_publique_hospitalire.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/f/68110163285.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/f/is_it_possible_to_learn_korean_by_yourself.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/jilazivowukuvisopodonivu.pdfIn PDF document text
    • http://biwonuv.pbworks.com/w/file/fetch/145024410/minecraft_free_version_1.14.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/what_does_service_due_soon_a12_mean.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/f/63533383127.pdfIn PDF document text
    • http://doxawadar.pbworks.com/w/file/fetch/144681723/bilinejopojevivozojawi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE259 5768 bytes
SHA-256: f4316b54e5fefb73d48d40e44fe2328a51e183a58eb4e6f43b8e409d7159f4a1
font_01_sfnt_off0000f5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5ED 11432 bytes
SHA-256: a833021c8cb055e1235ce7edfa8bd968cae1895b45ed6fe48f391d9eb977f4f3
font_02_sfnt_off00011c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9D 16060 bytes
SHA-256: 313c3940a6f4aae92ceaa1b1a843de6e6f13411355a457aba6e018c383fce54c

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