Malicious PDF — malware analysis report

Static analysis result for SHA-256 628f7ee761e21591…

MALICIOUS

PDF

74.7 KB Created: 2021-01-17 20:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8f81193d7f8971a60b439608a042313f SHA-1: 7cec759bb4060f44cad7288566f53b80f8cb234c SHA-256: 628f7ee761e21591f6d591a88b86182f2961b225996c8d6edad0522cf1ffc2b8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. ML classification and ClamAV also strongly indicate maliciousness. While no scripts were extracted, the presence of embedded URLs and the redirector link suggest the document's primary purpose is to lure the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=magicjack+for+business+app In PDF document text
    • https://cdn.sqhk.co/xipepovivik/jEjidBm/jewev.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/jjib9ii/getudox.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/hbQiisx/kelenivuturemesino.pdfIn PDF document text
    • http://xulenegutuwovi.iblogger.org/aircraft_landing_gear_hydraulic_system.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/ajjSajj/one_year_calendar_printable_2019.pdfIn PDF document text
    • https://site-1177263.mozfiles.com/files/1177263/top_spanish_music_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/UWt0Yii/4751801832.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/a4D1Qgg/sojotifuledudifi.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/6gdKCfh/garden_bounty_juicy_fruit_link_puzzle_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://favekagopu.epizy.com/zenonia_4_class_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/la_la_la_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/electronic_circuit_repair_guide.pdfIn PDF document text
    • http://pajamubo.rf.gd/android_application_developer_resume_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/donelevinopelukimenad.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_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 5436 bytes
SHA-256: bdce95c4aad8ca9ec1333b6a14e6f2d48b1c3ae5f501eba2e42e56630f88fbc2
font_01_sfnt_off0000f7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A6 11112 bytes
SHA-256: d6361330e32ba286ef8a2e45a5a1efeb33b2a2b9990c13043285a8e20e5cbc42

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