Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb27f01c145469e…

MALICIOUS

PDF

73.6 KB Created: 2021-02-26 05:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7234cd6f589c881c0632d48ea7942cc3 SHA-1: 5fd9f862044339a9afe0f0a60571c71e3861e845 SHA-256: bfb27f01c145469e09724bbd3602249ecc8985f21fb60784f089d64df2939368
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://baarspo.ru/wix?keyword=the+complete+idiot%2527s+guide+to+numerology+pdf PDF link annotation
    • https://cdn.sqhk.co/jimumakevaji/GhficVV/60786100323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483864/normal_6031bf34d56e4.pdfIn PDF document text
    • http://wgathering.org/kayla_itsines_28_day_healthy_eatingvatvs.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/68007723285.pdfIn PDF document text
    • http://geniusenglish.space/what_is_quantum_tunneling_composite_used_fornpmpx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380084/normal_60021667d2cc2.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/1fEWhdw/nbc_connecticut_weekend_anchors.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467561/normal_5fe31eff4d2c7.pdfIn PDF document text
    • http://akb54.ru/77710684632z8eyd.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/lkmdgjb/pawurul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471091/normal_5ffcb9ffbf387.pdfIn PDF document text
    • http://yeswins.space/zoduzojepinosuwuogi0e.pdfIn PDF document text
    • https://cdn.sqhk.co/zokelofid/R5Mgiic/76099991663.pdfIn PDF document text
    • http://lighttravel-ng.com/how_much_does_it_cost_to_become_a_computer_programmerepyt4.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/tevubem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412582/normal_600cb634d82be.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/ethical_hacking_training_institute.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabiwilurase.atwebpages.com/43290656832.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/puvoribixemuruli.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/call_of_duty_modern_warfare_beta_dates.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/spotify_premium_apk_untuk_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/lubumu.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_off0000e24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24E 5444 bytes
SHA-256: cddf8ce368510afaedd7a8292c0b6948f332db6b66166f6b3b5263c561614c54
font_01_sfnt_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 10328 bytes
SHA-256: e259882ea18fbb270a9d093da226b4d92833277b081056b7132b73db1f5ddc64

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