Malicious PDF — malware analysis report

Static analysis result for SHA-256 05aa0a05c8691af2…

MALICIOUS

PDF

74.8 KB Created: 2021-03-28 08:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5fa9100f5b1384a0db357fa1ab7b83cf SHA-1: c68a6b2289c34bea8971da369a6423f38b7e4315 SHA-256: 05aa0a05c8691af2261bf71dd4d17a3e5ce2041007ccd9b8de86ec6e4cd03c98
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=artificial+intelligence+movie++mp4 PDF link annotation
    • http://vitrinachel.ru/burris_eliminator_iii_4-16x50_laser_scope_cable_switchm9tmn.pdfIn PDF document text
    • http://itagreen.fun/nijajarupekupasecek33.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/cPd3qif/mozidonodi.pdfIn PDF document text
    • https://povisegidugukab.weebly.com/uploads/1/3/1/8/131871963/a024982be.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/7166469.pdfIn PDF document text
    • http://xteenware.online/best_camera_focus_app_for_androidjoegq.pdfIn PDF document text
    • https://cdn.sqhk.co/xadeviro/wR6jcjc/73501016979.pdfIn PDF document text
    • https://lipuxavevafip.weebly.com/uploads/1/3/1/3/131398459/jopifepagijorutipizu.pdfIn PDF document text
    • http://xodaxobomefawod.iblogger.org/mathematics_class_10.pdfIn PDF document text
    • https://vixawesomuwevu.weebly.com/uploads/1/3/5/3/135387162/3004491.pdfIn PDF document text
    • https://kaseledewa.weebly.com/uploads/1/3/2/6/132682802/vexowefirozez-tolazitebepu-kopuxajoxasod-fevofal.pdfIn PDF document text
    • http://fovekodabogad.iblogger.org/90154707778.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/hQhasG5/hack_game_jurassic_dino_water_world_apk.pdfIn PDF document text
    • http://hhizmet.com/dupebefarigujadavat1fgvd.pdfIn PDF document text
    • http://usejus.club/1420110469756cna.pdfIn PDF document text
    • http://helper-badges.com/xupufatefolufopusemabomapc1z62.pdfIn PDF document text
    • http://tamakar.tech/56852480402w6x0l.pdfIn PDF document text
    • https://niraxonaweza.weebly.com/uploads/1/3/4/0/134000156/vutugotaxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://setiwol.epizy.com/96614403824.pdfIn PDF document text
    • http://laganomezavarof.epizy.com/64047799090.pdfIn PDF document text
    • http://fipiwafupogo.epizy.com/descargar_bicentenario_pago_movil_apk.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_off0000e859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE859 5296 bytes
SHA-256: 3b34e572ae6a6724fd6a5d9c967d64f6dde0476c706abf6ae16ed9ac636b2b17
font_01_sfnt_off0000fa5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5A 10396 bytes
SHA-256: e4af13cd1e2e72e381a42b7ebe63ad3dff4abb25da4675c63df16ae4ddaee8a6

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