Malicious PDF — malware analysis report

Static analysis result for SHA-256 4183f587261de4e2…

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 19:47:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7da13ff9c84f334bc805112f405f6966 SHA-1: 377d1dfced318166241ec6d5ad7ddebfdebb514f SHA-256: 4183f587261de4e29843ef6e03950c7b06186f1f5e9a9359c4272e65dc343617
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a malicious domain, disguised as game hacks or generators. The primary link, https://netcdn.online/app/431946152/boost9-com-roblox-hack-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/boost9-com-roblox-hack-game-hack In PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/mcpe-download_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/robux-game-com_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000055f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55F1 25112 bytes
SHA-256: 4534ec0dab9a100de1c57e3cef00eaaaa93e83e42d819cc52ee34b30ea03a047
font_01_sfnt_off00008ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF1 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off000099a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A8 18708 bytes
SHA-256: 116e3350f892353559a46e1e2dd8dd97ba265176f89098854de85373f70222e5

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