Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfeaaf7339da003…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 22:43:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7591b644fe7f7f88a49194885569a00b SHA-1: b04a0757ad7474159b1b3f4e468d271b9683e928 SHA-256: 5cfeaaf7339da003f53f2c44db35e551a5e482238d818b2b4840bd97c7467e1d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary redirector URL, http://netcdn.tw/app/406889139/guide--coin-master-free-tips-game-hack, is flagged as malicious. The document body and embedded URLs suggest a social engineering lure to trick users into visiting potentially harmful sites.

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/guide--coin-master-free-tips-game-hack In PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-studio-app-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-hack-download-for-pc_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/instant-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/wurst-commands_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-gamepasses-for-roblox-op-as-f_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-kat-hacks_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-iphone_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
stream_002_off000031a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A6 23412 bytes
SHA-256: db0d0778f171f5469a6115c24dc5b424b51c479abaecb1c617e0679ac806a363
font_01_sfnt_off000066c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C0 18488 bytes
SHA-256: 72a1917ae8e8a7f30c7b1d5c4ccc6edf0a552f82cfb4ec0142f59bc197696ebb

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