Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cded1266a4ced12…

MALICIOUS

PDF

34.1 KB Created: 2021-06-20 05:34:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 889e066c99aa23daaaaf720b5de3b821 SHA-1: 8cfd59b1af24af41daaae5a1168fd09edb86fd70 SHA-256: 3cded1266a4ced12761e89c94c3106736cf34ce1ef0ed5edcc41bc98b71e5a5d
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains numerous links designed to lure users into clicking on what appear to be free game hacks or generators. The primary redirector URL, http://netcdn.co/app/431946152/free-things-roblox-game-hack, is associated with malicious redirector infrastructure. The document body and heuristics indicate a focus on 'free things' and 'hacks' for games like Roblox and Coin Master, suggesting a phishing or scam attempt to drive traffic to malicious sites. The presence of a 'password-protected archive handoff' heuristic suggests a potential multi-stage attack where the user is prompted to download an archive, possibly containing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-things-roblox-game-hack In PDF document text
    • http://library.atim.ac.id/repository/robux-hack-no-human-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-hd-rainbow-template-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/games-that-actually-give-you-free-robux-no-hackers_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/obby-gives-you-free-robux-no-password-required-2021-link_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/bux-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hacking-brotherss-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-robux-hack-pc-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/logo-roblox-cafe-gfx-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-tix-generator-download-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-working-generator-2021-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
font_00_sfnt_off00002ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF5 21884 bytes
SHA-256: 68d285cc9e93f7d16d2d685db9e534a3a7f547da76f4d1cb38469cd1998bb689
font_01_sfnt_off0000608e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608E 18936 bytes
SHA-256: 140e66014da446b693073cd4d93061bd4a1e41a4d43169b5f8ba9bc7d66813b6

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