Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d66bf10d804d40…

MALICIOUS

PDF

66.9 KB Created: 2020-12-28 05:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a1daa24412a9e9716d0c4ea263219385 SHA-1: e3dd1a36dec2c359539e19920839238177e18dc8 SHA-256: b6d66bf10d804d407ddd73d7b47e1f1214283a9a5e6e8d97f38dd964d6d9e6da
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to business continuity planning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/aws?utm_term=business+continuity+plan+template+ppt PDF link annotation
    • https://cdn.sqhk.co/pisupuwov/jdq1NNQ/78539739533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5fa05fbcc9091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381318/normal_5fc3f7149f950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445557/normal_5faf13d9ee670.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/gavobawum/nofotamitugam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd88ee0a-2f06-44ca-a0d0-f2f2ad87d3f4/66250866873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/384c11c4-feb9-4bb1-9119-d1aed65731c9/alvin_and_the_chipmunks_theodore_plush.pdfIn PDF document text
    • https://s3.amazonaws.com/bodepova/eternium_game_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/adolescent_health_services_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/aptis_test_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364fba28-3328-4d2f-a637-1e984956d757/suwiborezezajuneso.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/ragupadotunag.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_off0000cabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABC 5132 bytes
SHA-256: 3b8526db062f7b240fa61786ff2c94b192d099d8660a76892b0fc7573510fe28
font_01_sfnt_off0000dc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC31 10164 bytes
SHA-256: 4282e0be9be85fa728ac6bcac469adb11e1d78610671ec70d4a6f42378c3ce93