Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3de19c45c63f36c…

MALICIOUS

PDF

32.8 KB Created: 2021-06-30 04:48:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 64bebc8dde209ee04e5e98032643477d SHA-1: c91d834790484875af7b9f89149eabcc12134f62 SHA-256: c3de19c45c63f36c3a10d618355eea8a6644f63228eda38bc812842edce96888
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, employing a 'free generator / game hack' theme to trick users into clicking malicious links. It contains a large number of links pointing to redirectors and SEO link farms, indicating a campaign to drive traffic to potentially harmful sites. The document body and embedded URLs strongly suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/free-robux-claim-gg-game-hack In PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-how-to-get-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-robux-on-roblox-2021-pc_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-free-clothes-creator_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/pokemon-go-free-90hz_GM1094591345.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/hack-piano-roblox-mobile-download_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/cheats-for-titan-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-cheat-in-roblox-ninja-legends_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/como-hackear-roblox-para-tener-robux-en-pc_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-an-egtv-tshirt-for-free-no-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/juego-de-roblox-hecho-por-un-hacker_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/easy-ways-to-get-free-robux_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_off00002b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B00 21840 bytes
SHA-256: 9a834cb18a1135c087ffe4c80c75bd2ed01891cc0167eb69887a405e20336fcf
font_01_sfnt_off00005b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B28 19168 bytes
SHA-256: 33d7709a8c9481416a5a80e2cc2b1b1f89b0bb491081f0232967b74b6cac32b9

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