Malicious PDF — malware analysis report

Static analysis result for SHA-256 9085cb67fc8b3d2c…

MALICIOUS

PDF

75.1 KB Created: 2020-12-21 01:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72e936e2832d9087d9f0521b66379381 SHA-1: e99c491aaf6a958bf04e58b535520b9e5f32ae65 SHA-256: 9085cb67fc8b3d2cdf7cd4c55dc7b645cbddadcdcb78ffc7c62a267fdf5e8e97
96 Risk Score

Malware Insights

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

The PDF document contains a URL that is likely part of a phishing campaign, masquerading as information about cruise excursions. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to malicious content.

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/strik?utm_term=excursiones+cruceros+mediterraneo+por+libre
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f8ef9d1c55ed.pdf
    • https://static.s123-cdn-static.com/uploads/4401691/normal_5fdfd8516df00.pdf
    • https://static.s123-cdn-static.com/uploads/4452834/normal_5fc90a46d2815.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/03a752e6-c791-47ba-813f-0b98ea7c0369/divujedenuzuzazeri.pdf
    • https://uploads.strikinglycdn.com/files/c93669a0-c944-4c28-8f3a-25107559e928/pairs_plot_in_r.pdf
    • https://uploads.strikinglycdn.com/files/918b05b5-534e-4d8c-b169-05457b26c997/chat_n_chew_florence_al.pdf
    • https://uploads.strikinglycdn.com/files/85e6a008-b5d5-4fa1-82fc-cb434104aaa8/stargirl_chapter_11_summary.pdf
    • https://uploads.strikinglycdn.com/files/743e9c1a-3300-4f24-a7ba-10806a4fbe1c/zidixipiwobe.pdf
    • https://s3.amazonaws.com/pulujolatepuv/eano_guidelines_2017.pdf
    • https://uploads.strikinglycdn.com/files/f48f3059-ac9e-4067-afd8-c3eee9446921/9990695388.pdf
    • https://uploads.strikinglycdn.com/files/7645afad-6b3b-4a77-bff5-3fc2f73fdc6d/sawupesajufekoru.pdf
    • https://uploads.strikinglycdn.com/files/07a9e522-e209-48a3-8152-3d2669c5fe1d/sesubibak.pdf
    • https://uploads.strikinglycdn.com/files/f2ef3df5-4d1f-4cb7-9fbe-625f92a0f1cf/pugobamedejafogexef.pdf
    • https://uploads.strikinglycdn.com/files/60af7930-2ff1-48a1-80bc-f053b252ab4b/gee_handbook_of_discourse_analysis.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_off0000e1e2.bin
a48dc73e04b1f773b9990bdc4a0e95fe5791ec2bafa650a4e425db9d06162746
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E2 5384 bytes
font_01_sfnt_off0000f416.bin
3d4dbcd500dfdf3b3cba815214c2d280276048f4530d8c89ac2aaf2a61646bc8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF416 13124 bytes