Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b67af35bcd0a63e…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 17:00:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bbba5dd93b37b03f2b33fa647e7073af SHA-1: 783d66883d55c7039ffee4550328530a26d2e20c SHA-256: 5b67af35bcd0a63e5d0b5d54b042ae3f6213a8e964cf0f897f13326bb712b877
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, employing tactics to trick users into clicking links related to game hacks and generators. It contains numerous links to redirectors and a link farm, suggesting an attempt to drive traffic to potentially malicious sites or download further malware. The presence of embedded URLs and the overall structure strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/free-robux-stream-game-hack In PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/how-to-hack-and-edit-roblox-permanently_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/robux-hack-me-no-verification_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/blox-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/how-to-hack-roblox-on-computer_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/free-roblox-clothes-for-girl_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/roblox-free-suit-not-default_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/roblox-game-free-download-for-windows-10_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/cheat-engine-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://visti.rovno.ua/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.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_off00002d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D29 22124 bytes
SHA-256: 96003189fff056622a5c05c68fa9c90d1d38846f8e859ee2002fdf19ae7af4a2
font_01_sfnt_off00005e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E81 19080 bytes
SHA-256: 1c6afd9c6a74c9760f64a05e730cb8b9fe2917919de1f03b4396640c76df1420

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