Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4151342326c2fa9…

MALICIOUS

PDF

92.2 KB Created: 2020-12-18 12:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9aafbc0cc1e3e31d14c1043ede40d4c1 SHA-1: ea1f895d5b1952168bb7218e8d0da727434a9b80 SHA-256: a4151342326c2fa9ef78bd1e7955062851d76d5ce6cd6806c4bce16b439f4b5e
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=central+angles+and+inscribed+angles+answer+key PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vudivuzakal/australian_universities_list.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/57990059796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e9f4c6-6e27-4d69-b6f8-4265bfe9718a/digital_electronic.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/sarah_plain_and_tall_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/xiwewaduronawepifasesob.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/iowa_code_708.2.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/soledero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f773e8-4a90-487a-9723-ca7285b883fd/st_dorothy_church_bulletin.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/jozogofis.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/86207816594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3dbb5e-f07e-4312-bb89-22933b67f544/ets_official_guide_verbal_reasoning.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001151f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151F 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off00011f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1A 5208 bytes
SHA-256: 01892e1ffef4dccad28507ff970f3e8778bfb6f9b70003bc496212bae5aec213
font_02_sfnt_off000130e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E8 9932 bytes
SHA-256: 0834295bad1439006005b81dfe49fb741585c1050908440e191960e20d103eb5
font_03_sfnt_off000152cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152CC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3