Malicious PDF — malware analysis report

Static analysis result for SHA-256 d613778e6be273ac…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 22:26:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3113c148b04a0701d33bb99118582af2 SHA-1: 5403ab9e9d1831b4e1dfa3b595984b468921fe84 SHA-256: d613778e6be273aca11603bb3efc18fd443e6ead984e83797ac64faa5d398899
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, primarily offering 'free Robux' or game hacks, which is a common lure for malicious content. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this intent. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/free-robux-generator-2021-game-hack PDF link annotation
    • http://www.pspmrsmkber.com/opac/repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-hack-mod-menu_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-play-as-geust-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/badge-giver-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/urbex-club-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-roblox-clothes-temp-downlode_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/the-free-game-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/hiw-to-get-free-robux-on-roblox-2021-fast_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-hack-no-survey-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/roblox-dll-injector-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-free-coins-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_off00002f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F68 22496 bytes
SHA-256: 6c5d73d580b68e909fa0386673e89fa81d582ae6518001f7fba7fcd4823f802f
font_01_sfnt_off000061d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D5 19224 bytes
SHA-256: e428ca4c21c8feda58ff9d2cee9e63eb7b19a929803cf1f6eebeef0755d1c14a

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