Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afaf1318f90d71f…

MALICIOUS

PDF

33.3 KB Created: 2021-06-25 00:35:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ad3dc238e879393f54d08f7f77547b5b SHA-1: b09612fd39c124ff9c698f5f52ee0bea4b5f3001 SHA-256: 8afaf1318f90d71f62106fc740c67f5e1e5e98ceba97b58c303a089de283398a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users to external sites, many of which are part of a link farm. One critical heuristic identified a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body reinforces this by mentioning 'hacks' and 'cheats' for popular games, and includes a call-to-action phrase.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-do-hacks-with-admin-roblox-game-hack In PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-escape-room-theater-cheats_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/robux-hack-tool-download_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-robot-animation-pack-free_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/weight-lifting-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/snip-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/cheat-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.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_off000029b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29B4 21972 bytes
SHA-256: 9c0020ca34d1c22ab07502c5015416fb4602fdf1186c4b7f2e5291c968abce74
font_01_sfnt_off00005a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A50 20012 bytes
SHA-256: 15592991f80d4bff182a9846a9db31de7ece9bcd546d68a2f12566d6a3d58ef5

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