Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd225c53f9b4159b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 12:54:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 77fc9405a46f5bc79f7301d3018bf20c SHA-1: 238ec66cec43efae7affd55540393d0cd89f7e67 SHA-256: bd225c53f9b4159b0ac85d618532dda9c225e502af3d4b10b50ff8804494bb5c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, disguised as a game hack generator. The document body and heuristics indicate a lure for users interested in game cheats or virtual currency. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

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-to-hack-in-roblox-prison-life-2021-game-hack In PDF document text
    • http://library.futureuniversity.com/repository/free-murder-vip-servers-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-card-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/no-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E67 22972 bytes
SHA-256: bb1832205efd151cca9485488252eb40ebfb95b0a1958e791528c4a88543988f
font_01_sfnt_off000061e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E6 19496 bytes
SHA-256: f7395582e35f54f106e13b57ecaeec2b54e9337b6ad939a341c78db615fc9161

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