Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb00a9d6312e17c…

MALICIOUS

PDF

71.8 KB Created: 2020-11-21 00:19:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2afeb4c01c761985908a4ecb4a9db91 SHA-1: 1b4fae633366c09caf6d076aab53fc4b36376a8b SHA-256: 4cb00a9d6312e17cf81c65af8e80bfe4b9746d5a69c84bc60fd3db070d259c0a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is a strong indicator of a phishing or malicious redirection attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffe.ru/aws?utm_term=bleacher+report+wwe+fastlane+results
    • https://cdn-cms.f-static.net/uploads/4390328/normal_5fa1cfc8f417c.pdf
    • https://cdn-cms.f-static.net/uploads/4467955/normal_5fb6a6e8abe67.pdf
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5fa9da5948dc1.pdf
    • https://cdn-cms.f-static.net/uploads/4383703/normal_5fb3335f704f4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c73f0405-baf0-4f7a-b116-f251304b2873/bomb_it_7_agame.pdf
    • https://uploads.strikinglycdn.com/files/80bb2c44-3ae3-4b8d-b625-e10b95615e8a/macbeth_be_the_serpent_under_it.pdf
    • https://uploads.strikinglycdn.com/files/20a69b1a-a7d2-4c46-ad17-2bab945d9943/61198220817.pdf
    • https://uploads.strikinglycdn.com/files/8b368e1a-e166-4ae0-bc79-5a3f75aa9e93/vapekivujozosupofinimagi.pdf
    • https://uploads.strikinglycdn.com/files/5161df1b-deb1-4097-a411-0a76e5fa4406/paper_mario_world_2_unblocked.pdf
    • https://uploads.strikinglycdn.com/files/9b15e03d-922a-4157-8e6c-e1043ba10db3/sandy_grove_middle.pdf
    • https://s3.amazonaws.com/votawawo/zebive.pdf
    • https://uploads.strikinglycdn.com/files/9d930c22-f0b1-456a-8446-ed78a12c9174/42430620953.pdf
    • https://s3.amazonaws.com/vavapekadoliti/movie_theater_rivertown_mall_grandville.pdf
    • https://uploads.strikinglycdn.com/files/4d882d27-f944-4ba3-98f3-e03dd25451bb/ciconia_when_they_cry.pdf
    • https://uploads.strikinglycdn.com/files/8caf3b93-58cc-4916-8a46-08f073978baf/stove_top_percolator_coffee_pot_made_in_usa.pdf
    • https://uploads.strikinglycdn.com/files/a23331e5-c8d6-4cdb-b1e0-5d83b4f75aa6/2d_animation_tutorial_for_beginners.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1b.bin
1a404f8ae6eb2d3c739a31f6640062539d5594a9e8aa54785dcbdfe4c6b93b26
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 5244 bytes
font_01_sfnt_off0000ef00.bin
66f507336ff27e15453002958875d9e23f99297c5a2f0c6635a9771aee3dc91a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF00 10368 bytes