Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4736d86995d45d…

MALICIOUS

PDF

71.3 KB Created: 2021-02-03 17:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 108bf81a8397ba797c2b191f51d253fd SHA-1: 265851678fc434d850eaf0d6aaa88fcff33bec36 SHA-256: ac4736d86995d45d0cfcaac2b66e16d06d8059a99dc173dde57bfbad2d397c79
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for downloading a game mod. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into downloading a secondary payload.

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://leonvi.ru/aws?utm_term=brawl+stars+mod+apk+for+pc PDF link annotation
    • https://cdn.sqhk.co/remowiwa/ghPhbhh/piparejavaloxafib.pdfIn PDF document text
    • https://cdn.sqhk.co/mupalewefe/4jdSjjB/big_wings_milwaukee.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/cBighgY/tumblr_wallpaper_cute.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369909/normal_5ff53f9c82c92.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/jflhd0T/safari_calling_card_rates.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493549/normal_5fd9fd4fb29cb.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/sJ4hhRT/85632099739.pdfIn PDF document text
    • https://cdn.sqhk.co/winudesuw/ifjghec/2248272592.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/hILigFL/talking_heads_my_girlfriend_is_better.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/HhjhhXr/cinemark_theater_monaca_pa_showtimes.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/cEECGji/wosuwilogolanivinaworuga.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/hjgjbih/wuzenavigewizorije.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/veraxawewib/52773083720.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/48253634845.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/nuwogelil.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/miya_bhai_song_pagalworld_video.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_off0000d6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DD 5504 bytes
SHA-256: 249f1f157d012209b65dc9a1083eeb38161220c52f717f0a4e01e6c0d65b0242
font_01_sfnt_off0000e999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE999 10984 bytes
SHA-256: dab8270ca4dda2e9fb229245231f76dfc395d39ddf8bf32c935af25981d4f286

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