Malicious PDF — malware analysis report

Static analysis result for SHA-256 841995948d638e63…

MALICIOUS

PDF

33.4 KB Created: 2021-07-20 16:48:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fd92b1ef73e2aa7c98607a2caca96a49 SHA-1: aaddfe0639d286bda25f0ee6942f8b1c82026265 SHA-256: 841995948d638e63f8097655a86f368de88b070fa73e37431cfff13d39ee155f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and generators, specifically mentioning 'Roblox Free Robux Generator' and 'Coin Master free spin codes'. The presence of these lures, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or scam attempt. While no scripts were explicitly extracted, the document body contains embedded URLs that are likely intended to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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-free-robux-generator-game-hack PDF link annotation
    • http://radoszyna.pl/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://radoszyna.pl/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://radoszyna.pl/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://radoszyna.pl/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/daily-free-spins-for-coin-master_GM406889139.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_off00002e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E68 22052 bytes
SHA-256: 36954202bb6591f54e45173ddfc774cea4d9231c4be1ad1994c3d72d155cb0d2
font_01_sfnt_off00005f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 18604 bytes
SHA-256: f4da5a4be87a865c2adc8534a5df385e39f9c5c84370db66cd94c5780a417de6

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