Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb596f66e10d7ec…

MALICIOUS

PDF

125.6 KB Created: 2021-03-15 13:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ffc963f26876c6ae4e8173ffb5c9a555 SHA-1: 43fc21544f85abdd7537c6eacb436cfed64fe435 SHA-256: 3bb596f66e10d7ecdc319fa7fe298b90bba1c298dd532b570bdb7737d7c7a847
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically masquerading as a 'u of manitoba campus map' to lure victims. The 'SE_CALLBACK_LURE' heuristic indicates a potential callback phishing or tech-support scam pattern. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document, likely serving as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=u+of+manitoba+campus+map PDF link annotation
    • http://gixapedotamerow.mywebcommunity.org/abraham_maslow_hierarchy_of_human_needs.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/oligopoly_market_project.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/le_corbusier_five_points_of_architecture.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/kegib.pdfIn PDF document text
    • http://pezigedires.22web.org/how_to_pair_a_remote_to_dish_joey.pdfIn PDF document text
    • http://girepodemaz.getenjoyment.net/pawap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499972/normal_60013dee6aa86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368964/normal_5fdda1b683336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478669/normal_5feb64b02f8e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403804/normal_5fee9e63425dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449990/normal_6034dfae7e8fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://furugavasipif.epizy.com/eso_maelstrom_arena_sorc_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7522d85e-5959-4a88-b199-39f1f460c64d/33998319437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8d6204-d76d-4596-86b0-2cf7a8c2421a/three_phase_transformer_load_calculation.pdfIn PDF document text
    • http://sinusudixuxuwad.atwebpages.com/86891531778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4777937-2a20-4906-a2c7-012e6f3276b4/53352262757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4507ae-96c9-4072-8930-e77d85bb0129/29933482409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b7fc2a-fac5-4186-a9e5-c0d409c837fc/missing_411_strangest_cases_youtube.pdfIn PDF document text
    • http://nibizuladode.onlinewebshop.net/rutuw.pdfIn PDF document text
    • http://bepenopivite.epizy.com/kikikeduritelivuvowosap.pdfIn PDF document text
    • http://bupozefi.epizy.com/3004958107.pdfIn PDF document text
    • http://fepujivorer.epizy.com/anglicare_south_australia_annual_report.pdfIn PDF document text
    • http://refedeto.epizy.com/redopofufiveditiwexavima.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_off0001add6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADD6 5164 bytes
SHA-256: 13162447c00d2c02f75f6ffd1ee6658b3791c80731f5b8985231f6123b277d04
font_01_sfnt_off0001bf57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF57 12608 bytes
SHA-256: d25ba40c1eaa84762cd13cd4109b2715f974e16e4c8650adcd08ae4e6f22a419