Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2918eed673f8ec…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 06:18:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7f612288d957880a901db058cf734537 SHA-1: 6c1f02d65d0cbf4ef0f91ea35fa2dd87aad41883 SHA-256: 7c2918eed673f8ec95ca52029601b6ff9c31dcec907ba8479b04d0cb15c8927e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and external resources, masquerading as game hacks and free item generators. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that these links point to known malicious infrastructure. The document body and embedded URLs suggest a lure to trick users into clicking through to potentially malicious content, likely for credential harvesting or further malware delivery.

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.co/app/406889139/how-to-get-free-snacks-on-coin-master-game-hack In PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-game_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/www-rubux_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-spins-coin-master-october-17-2021_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_off0000303e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x303E 22576 bytes
SHA-256: 1749e4d0d97e116cc7d576c51f56fe916738458c157275de297d4302c278c86f
font_01_sfnt_off00006297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6297 18332 bytes
SHA-256: b6182daa68ff06b6167a35a103e01f243afa869e4713b8423aeb12bc49028461

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