Malicious PDF — malware analysis report

Static analysis result for SHA-256 0861cb1b875eefbf…

MALICIOUS

PDF

32.7 KB Created: 2021-07-01 07:09:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ee292fdc9ccad9f3f4ff54707da5528a SHA-1: 43c66c9ea03e5ea4b273a0164b8d81cd7e25ad67 SHA-256: 0861cb1b875eefbf64d951cded0d9eb75b54f66284336c948fac5d56936635b2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and generators to entice users. It contains numerous links to external PDF files and a primary redirector URL, http://netcdn.co/app/431946152/roblox-bloxburg-hack-game-hack, which is flagged as malicious. The document's structure and embedded links suggest it is part of a link farm designed to drive traffic to potentially malicious sites.

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/roblox-bloxburg-hack-game-hack In PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/kuso-icu-roblox-hack_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_off00002a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A31 22356 bytes
SHA-256: 57f62c4703e514f9398e58d8483cc5fe935005e1c56690a92caf3997dd4773b3
font_01_sfnt_off00005be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE0 18796 bytes
SHA-256: f6c6cfc8a4c74313b99c280e337f52933cf16367538b4e099c104341d6f73406

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