Malicious PDF — malware analysis report

Static analysis result for SHA-256 5699c995446d1668…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 13:00:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 45f331dfa25388a2a10ad8d47147a240 SHA-1: c43a831c71ff83fe515e36a7093c02aa35f5540b SHA-256: 5699c995446d16682529ab10933d216ab3b5fc6c85c0f123133fd1f35f717b77
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or malware downloads. The ML classifier strongly supports the malicious nature of this PDF.

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-free-spins-link-2021-april-game-hack In PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-roblox-pin-codes-2021_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/cheat-engine-for-roblox-april_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/how-to-hack-roblox-weight-lifting-sim_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-tiktok-likes-youtube_GM835599320.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification-on-pc_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/roblox-hack-tool-pc_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/roblox-world-free-to-use_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/roblox-sword-hack-script_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://amanaya.in/uploaded_files/userfiles/files/free-running-roblox_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
font_00_sfnt_off000032b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B2 22852 bytes
SHA-256: ed639513dddc7f72f171eae72e599375d83f1717b422a96d0e24df4d958661bb
font_01_sfnt_off000065ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BA 18820 bytes
SHA-256: 08a26911c431c2c7dfe5adc9e213d8dad12c699763a5d9737028d93893961ff1

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