Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1077eedc244cef…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 21:35:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e3f633f9d6cbf1595848a0d0c93eabd5 SHA-1: 34c7ec0db28399aa302216710a14fdc16b47c3a5 SHA-256: 9f1077eedc244cefe2db683ba7054507c0a0431778cdc05841f2271b6ab716b4
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/431946152/roblox-jump-hack-code-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/free-robux-really-fast_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-from-your-friends_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-draw-on-free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-bloxburg-free-to-play_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-stuff-on-roblox-mobile-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/pastebin-free-robux-fast-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/earn-free-spins-coin-master_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_off0000319a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319A 22324 bytes
SHA-256: 11a06c10689c6ac641e20071d429ddc5b346256b0d628f2457c0e2d1962db3cd
font_01_sfnt_off00006340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 19572 bytes
SHA-256: c056a83e7b40279615d47ed5ac6bef5d182190e769ab3432b27987fb0a848390

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