Malicious PDF — malware analysis report

Static analysis result for SHA-256 366cd91d95e9cccd…

MALICIOUS

PDF

32.6 KB Created: 2021-06-22 18:51:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b956523149774ddd6daa83f2b084736e SHA-1: 47e5b6861593bc6777e68a5aaaaae7dc3e13789c SHA-256: 366cd91d95e9cccdd401bb43b8bb3de0f1b45d24fdd6aa43922f07887c1e6c5a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector service that promises free Robux, a common lure for phishing and malware distribution. The ML classifier also flagged this PDF as malicious with high confidence. Although no scripts were explicitly extracted, the embedded URLs and the nature of the lure suggest a phishing or malware delivery attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/hacks-to-get-robux-in-roblox-game-hack In PDF document text
    • http://www.thecoffeebaron.co.za/images/pokemon-go-free-wallhack_GM1094591345.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-roblox-boombox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-hack-generator-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-coins-on-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/script-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-adopt-me-free-plush_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-games-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/is-there-actually-a-hack-to-get-fre-robux_GM431946152.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_off000029f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29F4 22060 bytes
SHA-256: 6b49b762dd41d6c2c12c154e0012350c8c1cf50b27129cb81d8043de35b50bb7
font_01_sfnt_off00005ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC0 18900 bytes
SHA-256: d1172d3e92dad0306c8a9297a75da0b7d4208e1493038f7fabf0779088c5cdf5

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