Malicious PDF — malware analysis report

Static analysis result for SHA-256 968c9c468f74c7d0…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 05:38:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2cf68add2ed4a75ee892045680c1fec5 SHA-1: 6dcbe877f0a9bef3af9bfcfc6f9bb9544cf04d9d SHA-256: 968c9c468f74c7d0519a110fac7bdc8032a813e4132b1c1abd6d4366e617ac72
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and free currency, such as 'get-more-robux-game-hack'. Heuristics indicate these links point to malicious redirectors and a link farm designed for SEO manipulation. The document body reinforces this by displaying similar lure text and URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/get-more-robux-game-hack In PDF document text
    • http://library.forda-mof.org/katalog/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/cheat-fr-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-murder-mystery-2-wls-3-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-free-dominus-hat-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-hacks-no-verification_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_off000030ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30EA 22600 bytes
SHA-256: 97abff7a7eb787c9a87293445f6e6cffb70590a085461125dd148add609c5b1f
font_01_sfnt_off00006356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6356 18852 bytes
SHA-256: b803333033a1d948a3e2070f5da6cc90ff41f413c00fb3b83224e61e6ba756dc

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