Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea0c86dd34c39d6…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 02:05:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b8b8fa661e5c0484cfc2bf9959c68752 SHA-1: 26bf5224b9d8726f20988d01ea341987ddcdfa0c SHA-256: bea0c86dd34c39d6953cbda5768eb512eb944e3e95891d1af09c8cf58cada1a2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external sites, many of which are identified as malicious redirectors or part of a link farm. The primary lure appears to be 'free Robux' or game hacks, aiming to trick users into visiting these sites. The document body and heuristics indicate a redirection workflow designed to lead users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/orewards-com-free-robux-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-do-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/project-pokemon-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/harked-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/the-best-free-hacking-tool-for-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/www-bloxburg-club-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/haxteamcf-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-no-human-verification-and-no-application-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-lost-world-2021-com_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_off00002f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F20 21668 bytes
SHA-256: fda312af52a5dc8008cba31a0db870dd190c5e856a91a9aecc2906ee69485707
font_01_sfnt_off00005ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED2 19312 bytes
SHA-256: 2fc58e6e34b5e1a71d14c980e21155da553bce1e3a50e036c939353e45099324

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