Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8761254508a482…

MALICIOUS

PDF

83.2 KB Created: 2020-12-22 04:58:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3675ddcc6df82ac9bf478d6ed85de50a SHA-1: 94ba547f0b1d78f18b74d7011d5b029201c1d2c7 SHA-256: 1e8761254508a482bc71620ff1173a23774219b6a7d0c96fd0a47f14d9641356
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high ML score. The embedded URL 'https://traffmen.ru/123?utm_term=old+grading+system' points to known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and the presence of malicious links suggest an attempt to lure the user to a harmful site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=old+grading+system In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_5fadc96e8b658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5fd30d55eef98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_5f9f9f64bbaa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424007/normal_5f9e4ce1846f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369525/normal_5fc97b3c1a8d2.pdfIn PDF document text
    • 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://uploads.strikinglycdn.com/files/064e0dd6-2fbd-44e2-bdbf-b04b04347261/abandoned_knight_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97aa6a5-3d3d-485e-9387-f802c2c3eeb6/captain_underpants_full_movie_download_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53232069-432b-4dfa-b4af-1a3ee3cf7822/maxefitubumodedi.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/carnivore_meal_plan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe13a29d00a716838849fe2/t/5fe155a65ef6353cfb4c4052/1608603047490/angular_form_reset_touched.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5813634-65c6-4388-b17b-440c78421f8d/vozaveb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd13e681523578e9bb2d01/1606226918407/poe_razor_of_the_seventh_sun_price.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 4952 bytes
SHA-256: c890ba657fa921a25ab66255b6c9773957bdea5ed52c746a9fb0233c49e927c7
font_01_sfnt_off00010ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC2 10560 bytes
SHA-256: 6ce2d31ae5be75cbcfd8e1c251e522d95127e4c8310c4e93552331ebf3f3f081
font_02_sfnt_off00013292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13292 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2