Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabb8db4714e18c3…

MALICIOUS

PDF

33.9 KB Created: 2021-06-25 23:29:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5e53f426bf552e49fe36bf66efac6581 SHA-1: 62dfb3c4312b6da45e24eeea5533e2fcf2038789 SHA-256: fabb8db4714e18c32977f3b5a097dc5e85a771c06cfaad5f692463c1c9afc829
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/bloxxer-free-robux-game-hack. The document body and extracted URLs suggest a lure for free game currency or hacks, a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

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/bloxxer-free-robux-game-hack In PDF document text
    • http://www.riverkennet.org/uploads/files/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/connection-free-mail-roblox_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/como-descargarse-hacks-en-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/free-robux-master_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/roblox-vehicle-simulator-money-hack-download_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/wls-3-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/best-free-games-to-play-on-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_off00002f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3F 21984 bytes
SHA-256: 43e9b671dd9f6385e548282dc3fd4436973879c4546c50f9a96a1560f716a001
font_01_sfnt_off00006014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 18788 bytes
SHA-256: 249b3139d8938606077fd966c8ca6a26e99f3c960ab4efd6f7050e80acb83d93

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