Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5a3d29d24c766c…

MALICIOUS

PDF

69.0 KB Created: 2020-11-30 04:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 39f05ab1a49a0793a85b1f69f9b2b0dc SHA-1: 7740e67f316818e172883763e21ca7799b46c6c4 SHA-256: 2f5a3d29d24c766c1ac07203a4967831c7b6b577222d6f9169c1a9fcf629c263
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO link farm attack. It contains numerous external links, with one pointing to 'trafftec.ru', suggesting a potential phishing or malicious redirection attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a deliberate effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=nippert+stadium+seating+chart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f8f6aad0b397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529780/normal_5fb2f6a8b2d99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413244/normal_5fb92bbe617c3.pdfIn PDF document text
    • https://ripilebaxozeduv.weebly.com/uploads/1/3/4/2/134266308/gazos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425738/normal_5fc449a76eb97.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/b98dc273-2cd8-4648-90e4-b0b0253b5dc5/2004_ford_expedition_eddie_bauer_own.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/create_website_using_google_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/gym_america_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/chemistry_notes_for_class_12_chapter_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e4bcb6-7ec3-4d69-b5b3-96b6f1b2ac7b/tarot_of_the_bohemians_papus.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/sosukazifodud.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/chale_aana_mp4_video_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca1aba4d-ea54-4c08-b648-239252c42a14/juxegumifulafafixa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA7 5424 bytes
SHA-256: b71a9f20f705cccdbbc208c64a194faa1824efe352db470cae23a3940b752e29
font_01_sfnt_off0000cef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF9 10312 bytes
SHA-256: 82057fa7578dc64df3147cd0ea943212e3697474c1e388d01815098c6b93965d
font_02_sfnt_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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