Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6af368a808b53a…

MALICIOUS

PDF

84.4 KB Created: 2021-02-24 05:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c7b23d7fa9ebf85ba944f4abd50b108c SHA-1: ee68dbd7ece826bc234725e84c49c0c07d9e79cc SHA-256: 7f6af368a808b53ac8964d4bb495635b699700cbe20954e58689189a4bb2988e
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 URLs, many of which point to disposable domains and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious websites.

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://leonvi.ru/wix?keyword=butterball+turkey+fryer+instructions+for+cooking PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490974/normal_5ff06a11b9b0a.pdfIn PDF document text
    • http://selectgetc.top/video_cutter_app_for_laptopata5k.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/9txjbid/94540689089.pdfIn PDF document text
    • http://vknart.xyz/0.13.1_minecraft_pep5lym.pdfIn PDF document text
    • http://prizinsta365.website/11071575133rzy82.pdfIn PDF document text
    • https://cdn.sqhk.co/datimemovuko/3PXDbOw/team_american_ninja_warrior_college_madness.pdfIn PDF document text
    • http://wodebawoxisire.22web.org/periodic_table_hd_image_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464734/normal_60258638517a2.pdfIn PDF document text
    • http://voztrans.ru/bureau_d_angle_informatique_ikeaf1l7h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403814/normal_5fcfb074c543a.pdfIn PDF document text
    • http://ig-mediateam.net/10255040336offq7.pdfIn PDF document text
    • http://paypallsecurity.com/allan_g._johnson_argues_in_his_essay_patriarchy_thatj2g59.pdfIn PDF document text
    • https://cdn.sqhk.co/raxedaninaso/ehiqNIi/sibuna.pdfIn PDF document text
    • http://life-news.tech/jotabolaxn2f6.pdfIn PDF document text
    • https://cdn.sqhk.co/nubavojek/gcnhbGP/counter_melody_music_theory.pdfIn PDF document text
    • http://rmk4sale.xyz/xuxibupyzind.pdfIn PDF document text
    • http://arbitestpark.xyz/can_illegal_immigrants_get_drivers_license_in_njnpsfj.pdfIn PDF document text
    • http://thiswaytovogue.com/52318182504y4p67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481841/normal_60165084bca6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajipesexadagon.epizy.com/cayaponia_tayuya.pdfIn PDF document text
    • http://bokatamekal.rf.gd/playstation_gold_headset_pc_setup.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_off00010c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9A 5404 bytes
SHA-256: ae32056fe79d094d76628abff3da599f52f869f358f051dacd488d62fa0bfdfc
font_01_sfnt_off00011f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F20 10684 bytes
SHA-256: 72eefeb74523d4dc19436579deca83b7e32cfe80fe4d0cc7233f04badd40f1d5

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