Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a8351e1fb9388c…

MALICIOUS

PDF

79.4 KB Created: 2020-12-11 12:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ea86f81b1bb4c4df4f1ce262290beb12 SHA-1: 7a9228e5906367e324978d0b93607db5caaff0e1 SHA-256: e9a8351e1fb9388cfebd5c3a8f8a58ea11a8e4e234caf3d69035668001a39d13
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://cctraff.ru/aws?utm_term=the+amazing+spider+man+ps4+trophy+guide'. This URL is likely used to lure users to a phishing site or download further malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/aws?utm_term=the+amazing+spider+man+ps4+trophy+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_5fd2291a3387e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404133/normal_5f980c2924d63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f90cc8dd69b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f9fb7b8c3cfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481516/normal_5fbeeb2a870f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_5fbba4da210b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407084/normal_5fc734a35a876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462035/normal_5fc907c2c3b21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_5fd0dbe522fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5fa1ad0b282ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5f8db787be5f7.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/jivamubug/cuneiform_stress_fracture_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/643918f9-2000-439e-b32a-a07621208ab8/spectrum_tv_listings_columbia_sc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d06104cd-9d60-444e-83ec-e224c4e175ee/gosoluvuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0e312edfcd2bda93a5b6/1606225458143/raxokewunodimetupudevo.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_off0000dfcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCB 5528 bytes
SHA-256: 0043c31bd22929364871514beaa3c1162f1b667a8fb0c990130a137164e2a70b
font_01_sfnt_off0000f285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 12488 bytes
SHA-256: a87b19e417a6efe068a445b4c05f2ffd565a0d40824ec3995532f6202e151c4b
font_02_sfnt_off00011b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7F 16068 bytes
SHA-256: 5d72d630640305d452d914085fd6c65e0d8125198bed8028c282d44fd0327be8

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