Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e61f0b9ad15f5c…

MALICIOUS

PDF

33.4 KB Created: 2021-07-06 06:49:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bb42af639dd547c9b573083732c91526 SHA-1: a278c076e4d2cdea95ef74d7e43e0062013c45d0 SHA-256: 17e61f0b9ad15f5c4d673f2aa3e08cde6c9f9a86047eb414a638de1c868da31f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, masquerading as a game hack generator. The document body and heuristics indicate a lure for free game currency, likely leading to further malicious content or malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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-cheat-engine-hack-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/free-play-games-and-add-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-gift-card-25_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-com-free-download_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-cheat-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/can-you-hack-a-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-money_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-roblox-avatar-items_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-hack-cheat-engine-download_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-cheat_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-codes-ipad_GM431946152.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_off00002ee0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EE0 22140 bytes
SHA-256: 51fd3bb96752ca8ef3ba20558a6bbb2e48a481fca618ec61f4aa1975a82fab56
font_01_sfnt_off00005ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF0 18172 bytes
SHA-256: e82ee3268dc79715fc84a0eba251e7e7fc7201a2349113e20b99f525f553e565

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