Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f93f1977e71b8c…

MALICIOUS

PDF

71.8 KB Created: 2021-02-22 21:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 65156dfe92354ff9ce4ae35d09e6c94a SHA-1: 735079e6ad4253abb60b9100514ee37c22a29705 SHA-256: d8f93f1977e71b8c40ef5c53c53e0fc36aa4c15f7354f8234b13f90225ac3308
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a phishing site, disguised as a resource for essay writing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/strik?utm_term=how+to+write+a+compare+and+contrast+essay+middle+school PDF link annotation
    • http://lomizagin.iblogger.org/55128410164.pdfIn PDF document text
    • https://volovumonanegom.weebly.com/uploads/1/3/5/9/135967081/dowamufonu.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/gRAfShj/real_rc_flight_simulator_2016_free.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/jamJiib/xafopavuvinapifotari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_600deb708d1fc.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/Q1Oghhd/dudolifivuz.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/jihhEJv/textured_brick_wallpaper_white.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/40292897986.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/22706569690.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/carcinoma_de_mama_inflamatorio.pdfIn PDF document text
    • http://borinalujid.epizy.com/c_pass_function_pointer_as_template_argument.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/dedijizofodibixonajix.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/78962210872.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_off0000dda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 5468 bytes
SHA-256: adda215cff32a91095124d069dc5a60bd0b7565fe7671730abb9f2300ad1ae37
font_01_sfnt_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 9980 bytes
SHA-256: 84f2c15f43ecfcb892cbbfa917a9d6274900f1bfbb3927fed361c16e55cbc17c