Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f483c228521d18…

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 19:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 97bc7f75e04ba896bdcc02123929aa4f SHA-1: 4f95c3296979ce00369fa8ba240962be3c109a17 SHA-256: 14f483c228521d1826ea86c58394ad982bcf528612d3919707199a8e2c1e6a7d
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 'free generator' or 'game hack' lures. The primary malicious URL identified is http://netcdn.tw/app/406889139/freegames911com-coinmastertipsandcheats2021freecoinsandspins-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites, likely for credential harvesting or malware distribution.

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/freegames911com-coinmastertipsandcheats2021freecoinsandspins-game-hack In PDF document text
    • http://digilib.iailm.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/circuit-breaker-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-generator-reall-100-xd_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-no-test-or-dowmload_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/bl4z3games-co-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/earn-free-robux-legally_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/wurst-client-112-2_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_off00003409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3409 22880 bytes
SHA-256: da0445bed7ba10c05bbb65f586ec9dd546147fe5382518fabe16dea12d0e20ec
font_01_sfnt_off0000675d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675D 19340 bytes
SHA-256: 336cd4fe356f1d557bb7c81c630fbec16c59259e54990c4d97f24f313c3c71ee

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