Malicious PDF — malware analysis report

Static analysis result for SHA-256 bedd6a5fe1657b2c…

MALICIOUS

PDF

62.4 KB Created: 2020-11-10 03:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: efaa7b413a9a90bc200b9ef169f9fde8 SHA-1: b721d73b3170a4da4a7d6438995b099a6e5028a9 SHA-256: bedd6a5fe1657b2cb0659aa01a1482353f267e2b1b12f860831317a0ea9ab51a
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 0.9996

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://cctraff.ru/123?keyword=pixel+gun+apocalypse+ez+unblocked+66 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451930/normal_5f9f41ec32600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f9e1b55628db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f88ac31677cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418557/normal_5f9b795c9ba43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_5f90b691719da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f9b1eb29bee8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sukedil/dufomivavesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e26b636-73f7-4033-beba-2aa7d612a6b6/zoriwexuwewik.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/bootstrap_grid_system_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/learning_russian_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/794d55cb-8b99-42a6-aee4-3a815e92f3b7/vuzawazarakabafi.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/8868259739.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/asociacion_civil.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_off0000b550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB550 5724 bytes
SHA-256: 325b42a5ecfc38b7b7fe9f26c1448913ff60402653c20e43346555b58cbc0815
font_01_sfnt_off0000c8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F7 10952 bytes
SHA-256: 2562a148215f493ca33d03e240ed09050a71497a8d40f50453a5bd75664e4a1c