Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91c667fa75b6f03…

MALICIOUS

PDF

31.2 KB Created: 2021-06-19 20:06:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 60924391b77942db58f5d25a4d9208b7 SHA-1: 9187014211370c05e2e575cbe4f723d39fcc9e9a SHA-256: a91c667fa75b6f03c9dc561acc1ee8ee55fbf4469b3748e9788411aa38f40d89
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics suggest a lure for game-related cheats or currency, likely intended to lead users to a malicious site. The presence of a password-protected archive lure indicates an attempt to bypass gateway scanning, further supporting a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-get-free-coins-in-roblox-assassin-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-tik-tok-2021_GM835599320.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-sword-simulator-power-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-generator-2021-no-human-vrification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-spot-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-password-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-gift-card-codes-for-free-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-cheat-engine-patch-bypass_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E05 23600 bytes
SHA-256: 475f613d825caf7a30c8fca9900c7866157ef77d15326688229a4f5dc5856929

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