Malicious PDF — malware analysis report

Static analysis result for SHA-256 353f9ce3eef450ea…

MALICIOUS

PDF

65.3 KB Created: 2020-11-14 03:12:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 78c88e411abf8cce9a1637077eca616e SHA-1: dfabd88acf1f58c9296f00cba0bdfc401bca92e7 SHA-256: 353f9ce3eef450ea8ee0078691531e4fd3931a290d7012fb1f5066189c4fb7e9
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://traffmen.ru/strik?utm_term=art+of+shen+ku+scribd In 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/7e4e1425-fe5c-42ff-a789-00695182d2f5/soft_summer_style_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e911268-9437-4c58-b35b-03e7d02d95ab/curb_your_enthusiasm_download_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c245e601-d913-4432-a6a6-ae678537b773/3157331020.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/35426921642.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/bicycle_suspension_design.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/bojasorarixule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ba68a4-16a4-4f23-85b3-0cd78ca02ae0/meaning_of_brown_dragonfly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa7fbc2a-e075-4e1b-9ed7-c68afc24bbd7/samsung_dvd_writer_se-218_driver_download_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e687758-b0b6-4096-80da-367d8d5e1d1c/34708429492.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/33328244788.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/canvas_student_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/81098889045.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_off0000c316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC316 5060 bytes
SHA-256: cf409031041c0fbbd5dee3dd144da1de647e8418bcf625602a97e7a30bb98f02
font_01_sfnt_off0000d44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44A 10820 bytes
SHA-256: cce8eacbd4ffd960465050ba04359b6c8280782f97bd94ecd0c466ce0eaabc03