Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c4f49d1beaca24…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 20:57:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: beb4ad3d53ab98e809c46bcf510e40f7 SHA-1: 6a80de9cc5e4ad29e46a41564acb302b47d44dce SHA-256: 27c4f49d1beaca24e74a4d391f97be8a66c852a5e4c4b49d93cdb02ddfae658b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins' for popular games. The heuristic firings confirm these links lead to known malicious redirectors and a lure for game-related cheats. While no scripts were explicitly extracted, the nature of the embedded links and the lure suggests an attempt to drive users to download potentially unwanted or malicious software.

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.tw/app/406889139/coin-master-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/i-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/facebook-cuentas-gratis-de-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-furniture-for-free-on-roblox-highschool_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-muscle-shirt_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-halloween-outfits-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/banning-hacks-for-khols-admin-house-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-easy-and-fast-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/pokemon-go-free-versus-pc_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-tokens-in-minecraft-ps4_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_off00002f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F58 22644 bytes
SHA-256: ecb2c005062cc211fd63754122bb586c684dbcfc1c452efc9143b4aaca760ebc
font_01_sfnt_off000061d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D4 17836 bytes
SHA-256: 84574f8323a35f53ec0be3b5c2b4531289117d356e64a8613214cbf4efbbad2d

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