Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf958cbc466711c4…

MALICIOUS

PDF

71.0 KB Created: 2020-12-27 18:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 99b677466b125fa0ff8bc664095d9a52 SHA-1: dd04572a8bd5a13afcf3dc889f0f294a17abb416 SHA-256: cf958cbc466711c4880dd7678b44da6bed9ed122649e38d5f5256b10af557954
104 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://trafficel.ru/123?utm_term=student+solutions+manual+physics+for+scientists+and+engineers+6th+edition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444852/normal_5fb8b74fc5755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f898bb99337a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_5fb3ef3e20dc1.pdfIn PDF document text
    • https://tumekisegazuf.weebly.com/uploads/1/3/4/6/134611428/taxetegigoxenako.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447271/normal_5fe78249d0243.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/6741250.pdfIn PDF document text
    • https://bobejezesolaz.weebly.com/uploads/1/3/4/6/134622741/9238613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446263/normal_5faf03d730ba7.pdfIn PDF document text
    • http://atomrooms.comIn 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/3943e3ee-2341-4551-bffd-52821604ef53/sidewalk_prophets_what_a_glorious_ni.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_off0000d481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD481 5928 bytes
SHA-256: 0ce87b7ac12b6c518204b4a6a147aed93acc766db9ff941b16c00c74822b3d88
font_01_sfnt_off0000e88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 11128 bytes
SHA-256: ac7b7667fef41b5894f08009eb8a2b172bb215908705b46ee65c400a1c91c896