Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef261a493a6cd86…

MALICIOUS

PDF

91.9 KB Created: 2021-01-18 05:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d48e5871efb7d6de5ca3e4595c1b2d16 SHA-1: 63cd4acba7dab134e3e7bf48f401ca68dbfc7367 SHA-256: cef261a493a6cd860a868514f0dcb55cc8f0e055fdd2c502fdcbe48405590bff
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body appears to be obfuscated or corrupted, but the presence of the external URI and the overall detection strongly suggest a phishing or social engineering attack.

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
  • 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://traffnew.ru/wb?keyword=in%20god%20we%20trust%20latin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5fb997dcb7280.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412183/normal_5fe114d465b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409118/normal_5fb81eb6c2719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_5f93953538411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426557/normal_5f9c387a37c37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479451/normal_5fbf86388c511.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408881/normal_5fc61d885ab22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_5fd13c2e09116.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473445/normal_5ffc1e51258d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5ff177c7ab26d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5fbe6f52c1ac7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5fecc6ab77309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_5fe95ff8c2711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459630/normal_5feb691362973.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/xajowu/maviwitazafolileg.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/foundations_of_behavioural_neuroscience.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/career_roadmap_template_powerpoint_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/58001686479.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_off00012627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12627 5020 bytes
SHA-256: 6777697d64f52be8620e1d02dd13ff82fd74195a93f0df8800301920127b7452
font_01_sfnt_off0001375b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375B 14008 bytes
SHA-256: 7daaced2a64cdc4b3682bcd5e33fccaff271fd73ad33fb724489155a4405a1ce

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