Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d65d86157f8987d…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 16:01:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 94bba88a09b9bd15184f58487ab135a3 SHA-1: 7051506676301c1cdabc2cbf888f0f970564b5b1 SHA-256: 9d65d86157f8987d09d8f4a552b6d57bf9a975cee27d2160932d46d4a71012f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/406889139/clean-master-hack-coins-game-hack. The document body and embedded URLs suggest a lure for game hacks or cheats, aiming to trick users into downloading potentially malicious files. No scripts were extracted from this sample, but the presence of malicious redirectors and the lure indicate a high likelihood of a phishing or malware distribution 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/clean-master-hack-coins-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/actual-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-form-rblxgg_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hack-robux-free-pastebin-no-subscribe_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-cheat-cods_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-sad-cheating-story-lbert_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-for-free-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-100-robuxs_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/cheat-roblox-shark-bite_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-with-proof_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-facebook_GM406889139.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_off00003281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3281 22864 bytes
SHA-256: ffaa1cdd1ca550e15dee86813ffe96a3c5cb3995cf0ddfb238c11ab92e0756e1
font_01_sfnt_off000065c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C8 18080 bytes
SHA-256: b792ad526cad4bfc6d994df976046642af0b8644436a9d4070e4c0c5b63ed45e

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