Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa7921046d80806…

MALICIOUS

PDF

66.1 KB Created: 2020-12-06 04:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 44868558ea5a4c9f7cb940195ed58b59 SHA-1: 171e0a361c64c26707356ea778fd6354e8e21dd4 SHA-256: daa7921046d808061f4180acc11358cac01057135e9d42cdc3a7a3c1bfb9b661
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL and numerous other URLs point to phishing or malicious content, suggesting the PDF is a lure for users to visit these sites. The PDF structure and content, despite being heavily obfuscated, are consistent with phishing campaigns that use deceptive documents to redirect victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://traffset.ru/strik?utm_term=algebra+2+study+guide PDF link annotation
    • https://bimelubisazabe.weebly.com/uploads/1/3/4/4/134492892/sivawivalep-pipetakawixe.pdfIn PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/bujifa.pdfIn PDF document text
    • https://vexepediv.weebly.com/uploads/1/3/4/6/134668456/gadevefi.pdfIn PDF document text
    • https://dizawiwutap.weebly.com/uploads/1/3/4/6/134629961/f9027.pdfIn PDF document text
    • https://kofufavok.weebly.com/uploads/1/3/4/3/134313370/dafodi_tezoxafefaj.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/tumasun/bulacan_state_university_online_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/33275024119.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/college_recommendation_letter_from_teacher_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecc6aefc-fd1f-4c06-9b43-3fc390d82769/74099147154.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_off0000c78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78E 5356 bytes
SHA-256: e2b2db9b990907345e9c885d868148348c04d1cf3c170264bed5e3a18ed5bfed
font_01_sfnt_off0000d9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D5 10028 bytes
SHA-256: 84a6f1caf138e14e9f859018f066d2e96dd3cdc4306a51d81439273bcb60b5d1

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