Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ac9ab14daa5f88…

MALICIOUS

PDF

38.0 KB Created: 2021-05-24 16:03:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6f5dfa880b13af8075df642cca0f68e6 SHA-1: 53d9ec16d8e447d19c964d0766318bc7dc947192 SHA-256: 45ac9ab14daa5f88939aaafa37f4682df0e286545e87fcd66b91ab50ea5d6f18
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious. The document body and extracted URLs strongly suggest a phishing attempt designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.xyz/app/431946152/how-do-u-get-free-robux-2021-game-hack In PDF document text
    • http://wirelesscommsys.com/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://wirelesscommsys.com/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3629 25536 bytes
SHA-256: f9b1f4a7a798ca3ec70af746c296e2b8ecbb2d20163624fc1900336217816ac2
font_01_sfnt_off000070b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B6 19040 bytes
SHA-256: 14ed63897d8c38c9b74f4ae6c685ddc963b8153977262fdb6411d06658c720a7

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