Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9d8ff7743fc493…

MALICIOUS

PDF

69.3 KB Created: 2020-12-31 00:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ed621161f20e5bb96ab05b820beb11c2 SHA-1: de8c34508138fc8faf0af6e68c7d2b2a865eb265 SHA-256: 4e9d8ff7743fc493abe05728ec68738c3fa424005bb2c5b5b4be212b7c0300a6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search query, likely intended to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of an external URI and the overall detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/wb?keyword=sudoku%20solver%20algorithm%20matlab PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447089/normal_5fd1008263aab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f893904daa57.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/hfijsO9/ruduko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470552/normal_5fe1a0e72db98.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/bb03a36d-3c14-4afe-9833-2d4c1046fd53/88782967467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231e3f45-eb83-4906-8691-5de926db5e3b/41371685438.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/ford_mustang_2019_brochure.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/27914346381.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/wepubusoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a93b0eb9-6bef-45f8-a2de-9fbbeebf12a9/airtel_my_plan_app_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/395c7318-52b3-4232-a8dc-7d2bf4f5cb9d/defuxanesodane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a0ae25f-26ca-40c7-9d34-bfb289477245/tafopunowewojupof.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_off0000ce0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0F 5604 bytes
SHA-256: b690097ddf45a198facbdb3cdda02cd41d7d700d3d768e5c80b45d62c1227473
font_01_sfnt_off0000e0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F5 11612 bytes
SHA-256: a6445138b5b77a075515cde0fd2c9c783196f35cf092f87fdb3c3c21506314ef