Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f12a667dcad280…

MALICIOUS

PDF

66.9 KB Created: 2020-12-15 00:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3b80d63c67a4a45cfadee8eea4a591f5 SHA-1: 7ae61d7a33d69f96b83b9e0aa3053fc8cc80084c SHA-256: f2f12a667dcad280c2ed37a364c5a2b4fefdce94c32845b9b17adfea7f3009c4
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. It contains embedded URLs pointing to external domains, one of which is `trafffe.ru`, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure. The document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=zinsser+perma+white+colors PDF link annotation
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/7a6ca6fee8e953.pdfIn PDF document text
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/ead6775d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f8fe9cb524b7.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/kevava/75469240486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba4bf65d-fdba-418e-9c0b-1924d9b939ea/ode_to_joy_piano_notes_with_letters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa9ae7d-23d7-4105-a012-40e0b6dbe2c6/80727851171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738b4c61-bcd7-4d88-a5e6-020689458a0a/square_dance_lessons_in_michigan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07cd167-6f39-48d8-919d-60bcaf269051/60331097634.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/letagojutubotexolodego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c7210bf-6260-4856-ba69-c074e7fdf0f6/fitepuxiwewemosasevil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa77745-b6bc-4df2-a357-6d5d5330524d/78085081505.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_off0000c53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53C 5220 bytes
SHA-256: 1947df5083db8e62fce616fa08b025a25909ebc23e50dbb4e0c0f72c446d2414
font_01_sfnt_off0000d6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E5 11644 bytes
SHA-256: e2b0b2f3d7a955938389cf80dedf37633fede54754ce798519af4f764fc9aa82