Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce257dee12a2905…

MALICIOUS

PDF

65.4 KB Created: 2020-12-07 17:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f6387f4ecaaef5e47b6006cb576156b1 SHA-1: 3bc0103e0ab9912cbb37c1afdd449d5bdea5f839 SHA-256: 8ce257dee12a2905efc940ffe40810ab3a6718806b5f5ff6fe17d2afcf62210c
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 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=tiger+cub+scout+leader+handbook+pdf In PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/jokulipakaberadufo.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/1289421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476123/normal_5fb33e814552b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_5f9cec4659207.pdfIn PDF document text
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/losike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479933/normal_5fb511b172d83.pdfIn PDF document text
    • https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/vumizokojapepobepagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f8ceeaf9faba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a9a64cb9-c3c1-4f13-8e60-c1b10867fc1c/wijelupekazasuvutum.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/15876276586.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/xevij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB703 5452 bytes
SHA-256: 5706a83f2df9bd8caf80eed11d83e4202b4c1f9708c3dd76130c7ff2467bab10
font_01_sfnt_off0000c978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC978 9868 bytes
SHA-256: 727450ba30a2c2e627191cfd5c70fbc859761dde060c78997a7f251fffd3466c
font_02_sfnt_off0000eb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB38 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f