Malicious PDF — malware analysis report

Static analysis result for SHA-256 944bd6dcf5c20328…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 06:18:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 22d59e64c307c02ac8cca4260be82c61 SHA-1: 09326b9d9e54da62f6a8d253aff33189a0454616 SHA-256: 944bd6dcf5c2032845cb5234d9b2e965948df6dceafdc3660f4847e0690e7beb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDFs, all promising game hacks and free currency. The primary redirector URL is http://netcdn.co/app/431946152/counter-roblox-offensive-hacks-game-hack, which is used to funnel victims to further malicious content. The document body and heuristics strongly indicate a social engineering lure for potentially unwanted applications 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/431946152/counter-roblox-offensive-hacks-game-hack In PDF document text
    • http://rollipolli.hu/userfiles/files/fbchampion_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-cheats-for-robux-android_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_off00002f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F67 22232 bytes
SHA-256: 9a940fa8b08e179804bb682f3aa16642e3eae96948cbc51e1b70b98454ee73ca
font_01_sfnt_off0000607b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 19136 bytes
SHA-256: 74dc53720ce0e97a77fc3d71efcdd2a5aadeb7251cd97978317fd2ff9c8aa80d

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