Malicious PDF — malware analysis report

Static analysis result for SHA-256 71af9cd6a7380300…

MALICIOUS

PDF

35.1 KB Created: 2021-06-25 17:48:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6a5bf1aabba06411503dd2b3402ed0db SHA-1: 7c626731fca7a5f3afa9ee91bad84490171acfc6 SHA-256: 71af9cd6a73803005f02ee5588431f0c79cc9084cf3b0d80a70375c83c99213b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this by advertising a 'free generator' and linking to suspicious domains. The presence of embedded URLs suggests an attempt to trick the user into navigating to a malicious site, likely for credential harvesting or further malware delivery.

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/free-old-roblox-account-generator-2021-game-hack In PDF document text
    • http://library.atim.ac.id/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hack-jhon-doe_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-into-anybodys-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-themepark-tycoon-hacked_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-earn-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/best-free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-scam_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/is-there-a-way-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/khaos-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-extreme-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/youtube-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-a-free-minecraft-account_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_off00003127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3127 22308 bytes
SHA-256: cfbe5555714c145a44c1dcef95cd6934134e1ae5ff837b1347c0e52f9cc9f56b
font_01_sfnt_off000062a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A5 19472 bytes
SHA-256: dd55ebd647511881646aa6276c206596f799f27861d17082da9e31cd91e85636