Malicious PDF — malware analysis report

Static analysis result for SHA-256 65fa36a9d08db416…

MALICIOUS

PDF

60.5 KB Created: 2020-11-24 07:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10b45935bd9c3db678907502fe3293dd SHA-1: d3c6b95e9b1bdfc6ed6ddc8a57ae1beda5957f43 SHA-256: 65fa36a9d08db416322610aaf83372e0dfb73aafa1b9f396bcc28ac2fba4b7ea
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier. It contains an embedded URI pointing to 'traffnew.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'autotune free software' and 'wkhtmltopdf', suggesting a lure to download or interact with malicious content.

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
  • 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/aws?utm_term=autotune+free+software
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuvovoxigumuz/pebukoriselozetef.pdf
    • https://uploads.strikinglycdn.com/files/c2333f9d-157c-4030-b1a6-afbe530c0cef/48466972165.pdf
    • https://s3.amazonaws.com/lovetijif/wulewarozokiwoke.pdf
    • https://uploads.strikinglycdn.com/files/7769983f-846f-4be0-bf84-4c5612031c57/zumekidifajavi.pdf
    • https://uploads.strikinglycdn.com/files/4653c440-f0c0-40e4-a57f-992193bdcc65/74068781488.pdf
    • https://s3.amazonaws.com/gedesisumi/2019_honda_accord_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/27115a3c-3d19-4e5f-8692-52e7bd9aec97/area_of_a_parallelogram_vectors_3d.pdf
    • https://uploads.strikinglycdn.com/files/cb9d43a9-5be6-40cd-bc35-15c7244f5ee7/wawilodefito.pdf
    • https://uploads.strikinglycdn.com/files/97d3c503-6e58-4b29-a8d6-bdbf24af2eae/bigatato.pdf
    • https://s3.amazonaws.com/xenavuxa/the_bacchae_william_arrowsmith.pdf
    • https://s3.amazonaws.com/retobifulipo/29589746114.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_off0000b23b.bin
65efa68b0b8caca4042a8a22fcbc13146aa42dd6a5efa7af53f529f665a67930		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB23B 4808 bytes
font_01_sfnt_off0000c2b7.bin
9a8df94b59526f259284ef40cd93929f84987784ce9f587feb011de256e472b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B7 10344 bytes

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