Malicious PDF — malware analysis report

Static analysis result for SHA-256 493517c5f4b2e9be…

MALICIOUS

PDF

74.0 KB Created: 2021-01-02 22:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0094d0d05779c96d892d792226b1d720 SHA-1: 6ac019dbdaaa4058c5e99741f939e3762df594ab SHA-256: 493517c5f4b2e9bee150c569447ee20a3d64bf0f4a15da24010b85b9672f4519
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=pokemon+conquest+strategy+guide+book In PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/lupafiwebo.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/K5jbaig/35162632559.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/S7Tzbrw/bmc_software_logo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501057/normal_5ff07b6db61a9.pdfIn PDF document text
    • https://cdn.sqhk.co/filumabit/dFgitRY/battle_simulator_game_play_online.pdfIn PDF document text
    • https://rizimajapalikum.weebly.com/uploads/1/3/4/6/134633575/6be087d7198c.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuwemiromi/3jisjha/fowuvikadisu.pdfIn PDF document text
    • https://fomomeku.weebly.com/uploads/1/3/2/7/132712435/3546827.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/dVjhafC/walmart_associate_inventory_app.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzujugasije/HjUbZib/car_art_wallpaper_hd_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/IvhBhic/xavutuwige.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/kepij.pdfIn PDF document text
    • https://sazigusejif.weebly.com/uploads/1/3/4/7/134771803/mifumanof_jijevaf_kegovax_jewinigan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500887/normal_5fc95fed9849a.pdfIn PDF document text
    • https://nexawukuvinu.weebly.com/uploads/1/3/4/5/134578226/gelunevebixerakax.pdfIn PDF document text
    • https://rumevupalod.weebly.com/uploads/1/3/0/7/130739773/ximapej_rupepekux_zufuvekatiw_reliwulirun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac63f73-a52c-495b-9da2-6dcfb1c6134c/wolfenstein_3d_spear_of_destiny_manual.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_off0000e379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 5660 bytes
SHA-256: 1c50f9e7c990912580bd66b154d252f8358a02fb4b76a65023484fea45813692
font_01_sfnt_off0000f6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 10736 bytes
SHA-256: 44870ebd46213327a5559e3dc2220799450df01d5d76e29420799a465878d7cd

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