Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ff2204b13b98c5…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 19:14:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a97cc071f2978d7a5f42657f5ef3ba8c SHA-1: a06fa671d0aa148d90e7881fbb7cbbb6c0d7b2d2 SHA-256: f5ff2204b13b98c5fd7602e10da5a9de5d88c1a8b8f745c8b96b535fb702a370
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as 'free generators' or 'game hacks' for popular games. These links, such as http://netcdn.tw/app/406889139/how-to-hack-coin-master-game-without-verification-game-hack, point to known malicious redirector infrastructure. The document body and embedded links suggest a lure to trick users into visiting potentially harmful sites, which could lead to further malware downloads or phishing attempts.

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/how-to-hack-coin-master-game-without-verification-game-hack In PDF document text
    • http://sttlets.education/senayan/repository/free-robux-2021-for-pc_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/ash-greninja-free-shopping-in-roblox-on-roblox-shopping-shirt_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/dungeon-quest-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-app-download_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-robux-2021-easy-no-download_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/download-roblox-free-on-mac_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-roblox-items-codes-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-big-paintball-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-create-your-own-roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/taste3-com-roblox-online-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-murderer-mystery-2-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-free-spins-link-today_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_off00003489.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3489 22564 bytes
SHA-256: bcb6b82e2e55a4603f7c4414c6a2009a39cbe2f8a25a9bce69bf54bec2da4a9b
font_01_sfnt_off000066fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC 19064 bytes
SHA-256: a8480d21748a50bcf9ac3d5cfbc0b0018be210baedebb5c1ff04cbf62fe825be

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