Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed2d55bd5663742…

MALICIOUS

PDF

75.0 KB Created: 2021-01-11 13:20:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16a8f236b6842a0ed9808a0b949c3210 SHA-1: 7bd1c91d9875f4f34b1be92de33538514326835c SHA-256: eed2d55bd5663742d5ab6fc22c3988f009af8d429461151ac2b775a85a9df65b
136 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL that appears to be part of a phishing lure, referencing 'anthem blue cross prior authorization fax form'. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may instruct the user to open a password-protected archive, a common tactic to bypass gateway scanning. No scripts were extracted, but the presence of external URIs and the overall detection pattern point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffine.ru/aws?utm_term=anthem+blue+cross+prior+authorization+fax+form
    • https://cdn-cms.f-static.net/uploads/4488322/normal_5fb8e1252b4ea.pdf
    • https://cdn.sqhk.co/fokivetezabu/dRigdif/wifi_password_hacker_prank_pro_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4417998/normal_5ffa1465b42ed.pdf
    • https://site-1242670.mozfiles.com/files/1242670/medical_fitness_certificate_for_school_admission.pdf
    • https://cdn.sqhk.co/junulevi/iietEhi/chapters_interactive_stories_cheats_iphone.pdf
    • https://cdn-cms.f-static.net/uploads/4422385/normal_5fbb7c9f7e762.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lekelepowo/41280568351.pdf
    • https://s3.amazonaws.com/susonanezaj/pamofaja.pdf
    • https://s3.amazonaws.com/medaliwifufugel/86473741861.pdf
    • https://s3.amazonaws.com/zozuxukoxo/little_fandango_violin_sheet_music.pdf
    • https://s3.amazonaws.com/purixifusipelid/lixukoluwulepojotavimibut.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_off0000e5b0.bin
d75e60cf610c21a00c8f0a2ca234e2c41e24548969aca7c50bd2c5d9def62b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B0 5504 bytes
font_01_sfnt_off0000f84a.bin
3af15c9e5e1773f58ef623947a884d3db074989b6f43d08bf736bf3729b1dcda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF84A 11272 bytes

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