Malicious PDF — malware analysis report

Static analysis result for SHA-256 2936f093f9c38b3b…

MALICIOUS

PDF

75.5 KB Created: 2021-01-07 22:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ce9bb24dd141f77579cce00988fd8849 SHA-1: ed900ba9d4794b7badbfa43ca461660214367031 SHA-256: 2936f093f9c38b3b973ca0dda6574886178208cd756824857da28905bee4824d
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 'https://traffmen.ru/123?utm_term=dlink+dir+655+manual'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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://traffmen.ru/123?utm_term=dlink+dir+655+manual In PDF document text
    • https://cdn.sqhk.co/vevigagexoxa/vijgjCR/fantasy_wolf_wallpapers_for_phone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f8d512c9bb82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/incident_investigation_report_template_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c940fbe-e0ee-414a-aef1-815c6a63f72b/celebrate_recovery_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba211f57-76d8-4393-9d6a-0e4c702ef3a5/coterminal_angles_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8bb043-dc13-4d5a-aa79-ca24a000b043/52958098426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32bcf1fd-fe52-4020-9edc-95148a0b8d89/lutegazib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf21067-12ea-4a2f-b64d-e29db5623efe/battlenet_code_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3863f314-266f-44b0-a430-2bb462775f74/suvixebepozi.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/unlock_kings_rest_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e7933a6-dd53-4099-bab7-1c134fd634e0/red_fog_over_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8488db75-9b1f-478c-b3db-119273f7023c/lijezinilaz.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_off0000eb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB74 5136 bytes
SHA-256: 5ecc261f75b11f6d7afffd336cfd0c0bc61b1335e366515ffccef3a9c2a7e276
font_01_sfnt_off0000fcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDB 10904 bytes
SHA-256: e7b8e76dc979b5b3a5cfc29f68a66a4afaea006c85cb0873280afc6ff0f7d9fc

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