Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f91521fc38ef65…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 14:33:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9855eecb52418995f191ea357a9b395a SHA-1: 37e5c87fe92b8674755ddd2d5bf3d76713037150 SHA-256: 60f91521fc38ef65e80dde8cfda869fee0db05319aa8b95f850ed4d8cd65b883
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and 'free generators'. The document body and embedded links suggest a lure to trick users into visiting these sites, which likely serve as a distribution point for further malicious activity. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/how-to-make-a-cheat-on-roblox-roblox-studio-2021-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-tools_GM479516143.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_off00005162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5162 25416 bytes
SHA-256: de94b5363541247a0cbb1466f67453bcfa174adf83501f4b58fc267af98de48e
font_01_sfnt_off00008a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A78 19648 bytes
SHA-256: fadfc98d652047682a6341f659fd6cd1474d62f5dd93973499e88169a9ef0ec3

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