Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b4c426711cb5ee…

MALICIOUS

PDF

212.9 KB Created: 2020-11-27 20:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 87c52460d911aef1c735b6d45b8f2245 SHA-1: 1d6c6a1fc37a5608c8f30257ed35cffead9bf212 SHA-256: f0b4c426711cb5ee26252d7f0bd1fa51fff7f09d33db372983df29a486b99802
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 'traffmen.ru'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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/strik?utm_term=9.+the+byzantine+empire+word+search+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5fa3601e65c2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_5f9d2b34d5176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415334/normal_5f94677eb8dc5.pdfIn PDF document text
    • https://vawirinivilil.weebly.com/uploads/1/3/4/3/134353209/aa4ea849c9.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/48e39770-a8ef-41fe-9a48-d4552e6b0fd2/north_boulder_rec_center_membership.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/free_online_editor_rotate_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/874cd57a-10fb-474b-931f-4ba25ec17f14/despiece_de_bomba_inyectora_diesel_bosch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efcf96a5-14fc-4efa-8e63-ae96b9fb1453/gith_name_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e7f208-7c03-4a57-9014-f58c07b8c26d/dgf_middle_high_school_rota_spain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76693ece-e900-4d1e-b617-2598e4d342c3/habilidades_docentes_en_el_aula.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_off0002fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC19 5756 bytes
SHA-256: 271763b0187fd4ff2b737beeb99cf1b29bf3bddc5a60c56fc0f06124edcce8e8
font_01_sfnt_off00030fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FA4 19480 bytes
SHA-256: ff2e1ffd0b6eeddc7c2a1f2243863047b9596f6a5777a431db1012e272064138