Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b3d340bb7e794d…

MALICIOUS

PDF

33.4 KB Created: 2021-06-18 07:53:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 83a4053a37bfa3ee8471c771eb378d87 SHA-1: d01523452fa41ede75c157f9b81c21bac6035e9a SHA-256: d1b3d340bb7e794d2dd1d376198e6433325f29a778c13cc0b3eb00f1609699e3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9824

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.co/app/431946152/how-to-get-free-robux-inspect-element-no-waiting2021-game-hack PDF link annotation
    • http://library.fk.upnvj.ac.id/repository/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/more-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/multi-roblox-tabs-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/comment-gagne-des-robux-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/jailbreak-roblox-money-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-hack-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-make-cheat-engine-undetected-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-2021-android_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_off00002ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACE 21700 bytes
SHA-256: 3f61a09ffdc75cd6dcac9e96fa08c2abf4870d8dd077d20bc195b5801739370e
font_01_sfnt_off00005a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A74 20216 bytes
SHA-256: aedf13fc265da4d0e331502cf96a27b7ddd245a09cbd0413e30939cec459bff4

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