Malicious PDF — malware analysis report

Static analysis result for SHA-256 80130be053685639…

MALICIOUS

PDF

80.4 KB Created: 2021-04-01 17:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6ce7ef863316340be830855553365cc SHA-1: d71560ef6821b50ab1cb973d3ed96f7420167a39 SHA-256: 80130be05368563932eaaa2d7eee72457d033e5f7fd49364941f0e1713a9fe10
116 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, specifically identified as a phishing trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to direct the user to a malicious URL for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=what+is+navient+student+loans
    • https://cdn.sqhk.co/jenireni/hb1ggUv/woreserekikedaranozulik.pdf
    • https://cdn.sqhk.co/gowamojon/cxRufig/youtube_dude_perfect_stereotypes_madden.pdf
    • https://cdn-cms.f-static.net/uploads/4369663/normal_600a00d42bdb6.pdf
    • https://cdn.sqhk.co/ramawuvade/gegiOgi/46868898802.pdf
    • https://cdn-cms.f-static.net/uploads/4386613/normal_60641f0b05697.pdf
    • https://cdn.sqhk.co/datolabevev/ib6Krif/medajekefalolujotilixefe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dosipive/literary_devices_and_their_meanings.pdf
    • https://s3.amazonaws.com/gowupuzokowuxes/dao_vba_access_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/71502f57-f73c-4945-8d8d-5b93af0ad566/what_is_a_bff_application.pdf
    • https://uploads.strikinglycdn.com/files/7671a82c-3214-4a9f-ba44-d6c7301f5423/5368602769.pdf
    • https://s3.amazonaws.com/bisute/new_cute_baby_couple_wallpaper.pdf
    • https://s3.amazonaws.com/wefadep/dulhan_mehndi_design_video_free.pdf
    • https://s3.amazonaws.com/vuforewebub/does_total_money_makeover_work.pdf
    • https://uploads.strikinglycdn.com/files/17cd9961-c6c4-4b04-9b20-44f515442aa8/62058817445.pdf
    • https://s3.amazonaws.com/mogipegi/zuxogirijojotodedejuvufif.pdf
    • https://uploads.strikinglycdn.com/files/d825183e-8ba9-4c5c-ae57-c46050934eb0/64994729651.pdf
    • https://s3.amazonaws.com/mukut/41748481830.pdf
    • https://uploads.strikinglycdn.com/files/ad6c7cf7-b87d-4177-b8a5-22b8f9e406b1/best_mechanical_engineering_books_list.pdf
    • https://s3.amazonaws.com/jidagafinuxesu/lavogafimikirigilakamiwuw.pdf
    • https://uploads.strikinglycdn.com/files/ea6786b1-43f2-4aa2-a8e0-2ef778c39f8e/construction_estimate_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f096.bin
f841702eab38a79c64967636f34abb033fd1b8b0d21e4ebbf85a76b92e22dbf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 4772 bytes
font_01_sfnt_off000100d3.bin
3aa48127620810e89314811a9c11fde40451a9a9d951f84c56fe4ade08e68677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D3 10936 bytes
font_02_sfnt_off00012604.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12604 4324 bytes

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