Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6736cba8a5825a…

MALICIOUS

PDF

32.8 KB Created: 2021-07-20 14:59:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 19e1bd38783e0869eab839440d8a6e26 SHA-1: 4b98e8776ffb76b025ebce122bbcc6f525fd1025 SHA-256: 4f6736cba8a5825af23fe8de58362cbf44820bd32eec45276694be2d5c68ae7a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to malicious infrastructure, specifically targeting users interested in game-related cheats and generators. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/431946152/free-robux-link-game-hack In PDF document text
    • http://ristorantimaculan.it/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://ristorantimaculan.it/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://ristorantimaculan.it/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://ristorantimaculan.it/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ristorantimaculan.it/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://ristorantimaculan.it/images/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://ristorantimaculan.it/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B4A 22484 bytes
SHA-256: ffef9e1d1f0a19d0dd5760903bb55d3ea6f85f25f772f1cab76ef0feea215682
font_01_sfnt_off00005d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D94 18492 bytes
SHA-256: 9eca6fbd5cd0f37ed8ace88e5720e13af9d6cfc94b1f583cbfa8342fc703f104