Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a3c894e917f59b…

MALICIOUS

PDF

64.2 KB Created: 2020-12-27 00:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ac4e9cf3bed20920a0252485f6d54621 SHA-1: 4a946c8f1e7168f00f8a954e5c0ea364344233cf SHA-256: 39a3c894e917f59b353f0576aa7ffe8e9afbbc66f8de87349c6c3ab805678dbb
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, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a malicious site. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=electron+dot+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392666/normal_5fad726f4adb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446017/normal_5fcf42a8ad5d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407069/normal_5fb953f3d1f6e.pdfIn PDF document text
    • https://cdn.sqhk.co/ledumixifer/njgjex8/jidokoj.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/isQZGhe/monster_energy_supercross_game_xbox_one_review.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/MHz8hjW/spinach_salad_recipes_with_strawberries.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/gMZiejj/murder_hornet_size_in_inches.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1f65d0-12f4-4112-9996-fdc0a8eedad5/jovezuvejusufugoxebawiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d1f3f9-2c7b-455a-8f51-9c579b7207b0/11419841545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1948bcb3-18ae-41de-9313-cf60ddb7f093/11229555193.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/tizizojeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4241dc5-4f18-4f4d-9104-31e76a633b74/nusizodujotogexuxijisos.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/75524157120.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_off0000c031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC031 4932 bytes
SHA-256: 5c399d3f8f8ab214eb3cf73d3d8cb0c075d62557ff7e7ab5b9a33c0099ab5f9a
font_01_sfnt_off0000d10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10D 10328 bytes
SHA-256: 5df01fc93b9b68278328428504cbc969414c59aac4a41f033bf17cf8d75f6cb5