Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd691c7c0165d265…

MALICIOUS

PDF

83.6 KB Created: 2021-03-16 10:07:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: aa03529014da10018e806f01293343fc SHA-1: 5eb35f5738dba9b8d1ab337811128f91dc511f5d SHA-256: cd691c7c0165d26574de2e80a9de48511d81fa4ffa4642e232f1d9f6524a9d5e
146 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the user is prompted to call a number. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing campaign designed to deceive users into revealing sensitive information or initiating fraudulent transactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://baarspo.ru/wix?keyword=rate+confirmation+template PDF link annotation
    • http://vabademajelid.iblogger.org/how_to_test_battery_charger_is_working.pdfIn PDF document text
    • http://baxosemot.iblogger.org/lasozutijuni.pdfIn PDF document text
    • https://cdn.sqhk.co/duloputemab/hdMhjje/girl_ludo_king_game_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/difjfUJ/love_you_hubby_quotes_images.pdfIn PDF document text
    • http://wawimetuboze.iblogger.org/avg_internet_security_2018_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/rudugebakivo/bSmZPgi/get_likes_on_instagram_free_app.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/gfjeSRH/motor_vehicle_inspection_paramus_nj.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/ggrgiJC/30597807836.pdfIn PDF document text
    • https://cdn.sqhk.co/kifavubivelo/crQwyha/fruit_forest_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/liregagibago/hbhcgcE/27330747620.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/jfie87v/87974660985.pdfIn PDF document text
    • https://cdn.sqhk.co/titesojijuko/hjhhftZ/pesujowodiwiwujijofaziluz.pdfIn PDF document text
    • https://cdn.sqhk.co/mejiwimuza/ehj6Qka/33656598068.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/hdyWahh/latest_whatsapp_status_video_download_pagalworld._com.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godutiliwaganos.rf.gd/weranona.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/32586647438.pdfIn PDF document text
    • http://foxinojale.epizy.com/towozebatagobuludarez.pdfIn PDF document text
    • http://zuwosopawekaz.rf.gd/21007623961.pdfIn PDF document text
    • http://ziwebizivag.epizy.com/86246574384.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/wumukubojanikuwez.pdfIn PDF document text
    • http://rakorasalonolit.rf.gd/tiwivutepib.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_off000107ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BA 4988 bytes
SHA-256: e6611a9da69f2de86ba391cf4467898ab730313be87bbf5156196cd8fc7562a0
font_01_sfnt_off000118a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A9 11844 bytes
SHA-256: 508b8abab3be8e28c03637bebe9e7417d81f80fee792dadc074b76dee3437e42

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