Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9b06e532fc55ea…

MALICIOUS

PDF

67.0 KB Created: 2020-11-21 09:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 421d7041d436a346f6cdc137389b8b4f SHA-1: 268defe77910d96326049566f0d124c4df213bf6 SHA-256: cc9b06e532fc55ea7ad8e56167318044647b48f94164554849fe161901d09a46
96 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 embeds external URLs that direct users to attacker-controlled resources. 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
  • 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://trafffi.ru/123?utm_term=medical+terminology+a+short+course+5th+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474977/normal_5fa971ffd01a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414491/normal_5f9b6c2b97b9c.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/053fd0be-f32f-4440-b1fb-f8d7b16cf930/los_objetos_fractales_benoit_mandelbrot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed473e0-720c-497c-9df5-87234decfccc/honda_trx_125_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6f5c1d-0002-4589-8586-822f03280b5d/marshall_mg30cfx_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b50dd726-9f51-4e45-9d32-fa8fe18104ab/bewuvexetasitisujoson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31776fb3-9923-414c-91ec-8d3f332255cd/7547633090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7128ecbf-fbd3-43ee-912f-bfcee8183718/65037440567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70aab3b2-a041-4559-8888-264f0fa80dc9/5343024141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b262bb4-a5ff-4cff-8397-2598313155e8/85803488496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cddf952b-85b7-421b-af49-17b69694ad8b/jejuxupobuburizagun.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_off0000c7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AE 5800 bytes
SHA-256: 10f6ff9805aa088a730632f88018bebe8c7d6af52ac47d764081075f591bb3d0
font_01_sfnt_off0000db58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB58 10404 bytes
SHA-256: cfb2ede534ee08c68e38f148f48f18beeda438c54cfacba22838a607a38a1037