Malicious PDF — malware analysis report

Static analysis result for SHA-256 91afdac5de7dbbfe…

MALICIOUS

PDF

66.9 KB Created: 2020-11-30 06:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a91f089a4e59a6b7779d479746e4b2d5 SHA-1: 9c20bcb98107e3bc21e3755c3baef96f90e21039 SHA-256: 91afdac5de7dbbfe64eff8930e9f36a468b6832dfc03a9673857a2227e06d5a9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffnew.ru/strik?utm_term=el+aposento+alto+magazine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f8dc54d6502d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_5fad67b0cc897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f9395b7dcb84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f87a369462c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403557/normal_5f9b30cfae4a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_5fad8a488295a.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/gumegulaxi/38073626348.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/960_grid_photoshop_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1dffc1-2a39-4db5-ad94-96d1369eea8c/kusuzosutuwobawof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c43414-fe92-4671-9643-c0161d39ed66/79804045991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd199e5-9c21-4e49-b677-0131464fb4b6/jidasika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/317b0da9-dbd2-4137-97d5-48b9e660f4e9/88210348804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3467f133-3df5-4025-baa3-07713c0e11a5/85924590506.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB37B 5048 bytes
SHA-256: 018afdcd00051213ee3815ea78f43793cbaeab22a549df090a53d0b47902fe7c
font_01_sfnt_off0000c4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A6 11136 bytes
SHA-256: 989a39cb7c0ea2def12de78513b61311158e2137f175671e2b6954acbabb3ba6
font_02_sfnt_off0000e7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D4 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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