Malicious PDF — malware analysis report

Static analysis result for SHA-256 948d9bc1c2bce04a…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 07:40:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7c7e16e9b0a0429a3a91faf1fb200886 SHA-1: b782310e507086708e973b1480eb9889916f7dcb SHA-256: 948d9bc1c2bce04a93a94cbbd82f0451eb3a0d62389f591e5d1ffa48f86b24c9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and a document body that explicitly discusses hacking accounts for free Robux, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. The presence of external URIs suggests the document is designed to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-do-you-hack-accouts-to-get-free-robux-game-hack In PDF document text
    • http://library.acehresearch.org/repository/roblox-exploit-injector-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/https-www-roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/cheat-all-game-money-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-on-roblox-october-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-account-stealing-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/sign-up-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/guuudd-info-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-non-hack-robux-generators_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/www-robux-us_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/i-got-this-shirt-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/cartoon-animation-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/jak-zrobici-za-free-postaci-w-roblox_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_off000030d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D9 22432 bytes
SHA-256: 96282f6594f00c451213e65a95b3183623b3d556708c464db44af685cc80825f
font_01_sfnt_off000062c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 19484 bytes
SHA-256: dcbb72cd7fe40be8b47f0eeea159eec37fd6c5a26d2ee65b561a0bd1844d817f

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