Malicious PDF — malware analysis report

Static analysis result for SHA-256 363d3dfa977d497a…

MALICIOUS

PDF

33.9 KB Created: 2021-07-20 13:31:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ae8912221ce6bff1a7cfa23110996524 SHA-1: b1a800d0429649e78ea9250243b34901234bf010 SHA-256: 363d3dfa977d497ad185fd9c413fe0652d40a3d9e519c87c03189cab1b5bb373
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to websites offering game hacks and generators, such as 'roblox-robux-hack-game-hack'. The presence of these lures, combined with a high ML classifier score and the document body's explicit call to action ('CLICK HERE TO ACCESS ROBUX GENERATOR'), strongly indicates a malicious intent to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit user interest in free game items to deliver a payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-robux-hack-game-hack PDF link annotation
    • http://ascom4.com/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://ascom4.com/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://ascom4.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://ascom4.com/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ascom4.com/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://ascom4.com/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://ascom4.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://ascom4.com/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://ascom4.com/images/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • http://ascom4.com/images/minecraft-svg-free_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_off00002fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD1 22408 bytes
SHA-256: 886715ac7bf294be3dc96fff243b6f35687e2852e099b46ccf90fc36ef383470
font_01_sfnt_off000061a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A7 18508 bytes
SHA-256: 4668884a5238ce392f70cf6270cdd41fb4d04f02843369cb50cdd53041a5b0b7

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