Malicious PDF — malware analysis report

Static analysis result for SHA-256 4edfb8233cff028d…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 14:08:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c2d2543a1fb278d9901adbfc19ef1886 SHA-1: ecb888f3026ad0af39bc77f4e1774723a8f725bf SHA-256: 4edfb8233cff028dbc348803b95c40c4ac49334e8db10503518775d715472db4
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF document contains numerous links disguised as generators or hacks for popular games like Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are SEO-optimized, suggesting a link farm designed to drive traffic to potentially malicious sites. The primary lure appears to be related to 'free robux' or game cheats, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/com-roblox-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/cheat-codes-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/earn-free-robux-online-android_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/infinite-jump-roblox-hack-descargar_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/booster-game-pc-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-hack-by-stealing-information_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-accounts-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-greenlegocats123_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-any-shirt-for-free-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-site-youtubecom_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-access-the-studio-of-a-roblox-game-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/supreme-t-shirt-roblox-free_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_off00002fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB2 22152 bytes
SHA-256: 1d3fb6cc2ffbac2b253fa344491bea8de00edaf5c465cf878550aaaf34bceb55
font_01_sfnt_off00006096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6096 18748 bytes
SHA-256: 5efbdd91acf04ee4189407ecfbc860d70cb86f9bc4f939de663b44da789917cd

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