Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc687894b4f1b4f3…

MALICIOUS

PDF

70.1 KB Created: 2020-11-19 04:34:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dce2e9d748e28ed56fb102379cd7395c SHA-1: 3a075bf558691084f44ecb94dce384eede27f079 SHA-256: cc687894b4f1b4f3aab6393597aff862ac8a5c6b4c382e015c033652fbf1be60
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The file is identified as malicious by a ClamAV detection and an ML classifier. It contains an embedded URI pointing to 'traffnew.ru', which is likely a malicious domain used to distribute a payload. The presence of a 'download button' heuristic further suggests a phishing or social engineering lure to trick the user into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=rb1+navigation+disc+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f8cee31a0204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f8a83f1302f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f9b43b06ce5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f911569762ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372376/normal_5f8a8627d9f12.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/22671b9d-1ec6-4666-a462-baca77c4c2e3/the_grapes_of_wrath_by_john_steinbeck_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/48892629724.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/absurdity_in_literature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c135f338-5149-4f27-8828-80e0dfd70808/russell_county_health_department_phenix_city_al.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc47023-e96e-41aa-8892-88c3b7d82649/chateaugay_central_school_district_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f250467-1c72-421c-a175-98ba6d4f3b82/4375748704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c11542d-0724-4903-9177-478f7d629209/combofix_windows_8._1_64_bit.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_off0000d160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD160 5364 bytes
SHA-256: 6c3e3c9e7e9be3ead186d3d2288fabda72bc4ddedc96cf3da09ab44b46d470f9
font_01_sfnt_off0000e3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D2 12116 bytes
SHA-256: b3fc3619b9a0c133ed85ba4acc7200fa84b5075fbba7d1d7c497a34c463ad4fc

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