Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0231e1a8558976…

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 19:49:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 58da43ced5d7ef0487a022744d11c864 SHA-1: 6b1ee9a14cefedbf0065fcf7104b52d2b74b0ff9 SHA-256: 7a0231e1a8558976cdf7d36d4b0fcbf05ca4a3c80e0c7b9cd706052a33cba308
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-related cheats and currency. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-free-spins-and-coins-link-today-game-hack. This lure is designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or scam attempt.

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-free-spins-and-coins-link-today-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/free4now-info-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/get-robux-free-no-disabling-adblocker_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/cheat-power-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-points-for-robux-easy-to-get_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/unpatchable-robux-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-supreme-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-hack-2021-april_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-the-scary-elevator-red-keys-locations-cheat-sheet_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/glitch-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/speed-hack-roblox-download-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/cheat-engine-roblox-da-hood_GM431946152.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
stream_002_off00003444.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3444 23376 bytes
SHA-256: 7834653d0af913d8dea0a33f8d44f909cd1d92bc6e090531b89c33f1ad058778
font_01_sfnt_off0000690e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690E 18696 bytes
SHA-256: a6f9ee4f31e630697269259bd77ba9f20f050f36d84dfdb118abf4b75a264952

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