Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b413025eb4b398…

MALICIOUS

PDF

75.6 KB Created: 2021-05-18 22:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f95892e1758be5135f677b0df93e6a65 SHA-1: 50fbf44272870099e908783845755dec799e879c SHA-256: e0b413025eb4b39877d612cae3a67c0cfa558fbc4832f3dc731571490914e395
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. The presence of a callback phishing lure heuristic indicates the document likely attempts to trick the user into calling a fraudulent number, possibly related to billing or account security. The embedded URL points to a domain associated with malicious activity, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://kuzutuzo.ru/strik?utm_term=how+to+unlock+umx+u683cl
    • http://takavejesutep.iblogger.org/vijaleradepolubekefose.pdf
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5fdd4ac9ade51.pdf
    • http://suzenax.22web.org/14537381135.pdf
    • https://cdn-cms.f-static.net/uploads/4459324/normal_5fd6787681fce.pdf
    • https://static.s123-cdn-static.com/uploads/4446280/normal_5fe3a751608c4.pdf
    • https://cdn-cms.f-static.net/uploads/4480878/normal_605fb48f76b9e.pdf
    • https://cdn-cms.f-static.net/uploads/4427077/normal_603147682172d.pdf
    • http://gajikabe.iblogger.org/how_to_remove_maxi_cosi_mico_ap_cover.pdf
    • https://static.s123-cdn-static.com/uploads/4447915/normal_5fe46417d4cfa.pdf
    • https://static.s123-cdn-static.com/uploads/4414498/normal_6000b4e8975cf.pdf
    • https://static.s123-cdn-static.com/uploads/4451945/normal_5fddf6bf0fdc1.pdf
    • https://static.s123-cdn-static.com/uploads/4480748/normal_5fec2d646ac02.pdf
    • https://static.s123-cdn-static.com/uploads/4382960/normal_5fce1495e8d05.pdf
    • https://static.s123-cdn-static.com/uploads/4365541/normal_5ff9df8426d59.pdf
    • https://cdn-cms.f-static.net/uploads/4369908/normal_603b815c87bb2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2dad3d2c-eb38-44cd-b731-80e732b9d4b4/75077121752.pdf
    • https://s3.amazonaws.com/mukutud/pengertian_asidosis.pdf
    • http://jonufinufezo.epizy.com/xirawixisuv.pdf
    • https://s3.amazonaws.com/xefezesebusu/what_is_a_godfather_and_godmother.pdf
    • https://s3.amazonaws.com/bufexa/dungeons_and_dragons_books_amazon.pdf
    • https://uploads.strikinglycdn.com/files/b2660bf7-58d3-4f39-b108-5987170a390c/how_to_get_fuzzy_lookup_in_excel.pdf
    • http://xosumuzav.epizy.com/14826756363.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d8.bin
a42ce5693640a644c56b159a318010ca2d70c9a65e884dabbc28963b0d678eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 5156 bytes
font_01_sfnt_off0000f671.bin
60adb822877f74a898ed6a053e3d71832301c7e64bf198bf61290f2f1d19e4c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF671 12752 bytes

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