Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad48e0a55a602f1a…

MALICIOUS

PDF

68.6 KB Created: 2020-12-03 14:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e93d2a4d18159fc05a4c28f825358e56 SHA-1: 211b357b6d0b22238aa35c250c89f34ea5f5cf7b SHA-256: ad48e0a55a602f1a8c2fddaa7df2c727c86debdfdd5df69e62212e0dbd75fb19
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, with one prominent URL pointing to 'trafffe.ru', suggesting a phishing or malicious redirection attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest this document is designed to drive traffic to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=sha+of+anger+mount+drop+rate PDF link annotation
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/5993015.pdfIn PDF document text
    • https://kozugirufeji.weebly.com/uploads/1/3/4/8/134884007/betazukinodozu.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/e272ab71-83dd-4df4-83b8-8b0421dd38e7/monument_14_characters_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87f4b6e-1f39-4746-b438-35521bb8e734/mork_saying_shazbot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc191a61452f90b7fea0e1e/t/5fc2b8b33c02f22b9d664bf6/1606596788420/momupodizikaxewijim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2677fa1c-6818-4280-a008-1b167a83b23f/la_complainte_de_la_butte_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68cba0a6-8eaa-4939-b451-61be204250dc/minecraft_john_smith_resource_pack_1.14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b391684-b8b5-47c4-ac5b-e8131dfdbaf3/direct_variation_calculator_-_symbolab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e4063d5-0517-430d-8da9-f30410ed8b0d/lightning_spells_clash_of_clans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a961a872-c2ac-4d11-a00b-6529c7f893e9/sekanomazotud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfab19f2-2847-4f8e-8941-42eb796f47a3/72313245885.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64750084698658e82ef44/t/5fc799e25fecd2174b64add3/1606916578896/pics_word_game_level_67.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d96ebd14ff0dd29c6608/t/5fc19b72eaf37e3b64d8f178/1606523766413/63907218460.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_off0000cfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE1 5348 bytes
SHA-256: 5920e359326fcdf269b713b38f871b8db288f918216c82cd1a9845104ff0d8b0
font_01_sfnt_off0000e1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EA 10604 bytes
SHA-256: 094aa967d4c7120e1ff16d88a4e1e6036f2d30acc2a3b5749036675c2f217a90

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