Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b1d7428b5defbb…

MALICIOUS

PDF

64.5 KB Created: 2020-12-15 20:16:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: add96d5962b67cbbe65819844e604bda SHA-1: e7b000d22b85ff3ece474794710b6b325f62dfec SHA-256: d5b1d7428b5defbbf8c3757e2f8335c910202e2a3f4173f24805c29a85284e73
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 threat. It contains an embedded URL pointing to 'traffset.ru', likely intended to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit user interaction for malicious purposes, possibly through embedded JavaScript.

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://traffset.ru/123?utm_term=anatomy+final+exam+questions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487197/normal_5fc9e046c46fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_5fd83013b08b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5f9184440e50e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fce126f41ec4a2cc0e0914e/t/5fcf1bcc7cc0b10a0aca1ebd/1607408589068/brand_maker_logo_creator_graphic_design_application.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48e53c6ccf69f3548322/1606371557530/77790391202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a430cc94-8778-4b67-ab37-b3102f6c63d4/childhood_and_adolescence_voyages_in.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ea2a10d6a92a7368d982/t/5fd6c4c4313c42342b9c6ad9/1607910606714/83525478965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7742cac2-837e-4b1f-a4f9-723a2973af6d/19737107861.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/bumafudido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8220e6e-aba0-473d-837b-883828010937/61267129390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e621f7e0-26df-4424-b0d3-632dadd43f59/ropofazuritebumuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b4c51b-ea72-48b9-a281-1738a3db6d6e/zopogikokabixasoparan.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/adjustment_day_chuck_palahniuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d960ee-3099-40fe-a304-6f24f88aee97/61087431468.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c9b47848ba205d3a529a/t/5fcd270cc836a917f9157daa/1607280398487/war_ringtone_download_mp4_pagalworld.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_off0000c1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F2 5104 bytes
SHA-256: 79e1651525fe1db5e674b8a940876b1cf7563e504fc7d82457b562a2d8966629
font_01_sfnt_off0000d359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD359 9936 bytes
SHA-256: b8b3bfd4486762db5c0d0b02b7f32be39c54cf9bae0dd1c6f045b4c3398e4940

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