Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a86bc22ec23c83…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 14:43:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ae79eee499815854ad166a6a09673c4d SHA-1: 367d0dfc31f8deabf1bf857687b90f5aa0729c2e SHA-256: 41a86bc22ec23c83b4d7da228f3ce0d3e80c51ebcdb87833961b227fc9bc977d
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 0.9980

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-cinema-4d-lightroom-roblox-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-how-to-use-cheat-engine-63_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-robux-using-cheat-engine-67_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hacks-counter-blox-roblox-offensive-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-name-tag-hacks_GM479516143.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_off00002e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E90 22696 bytes
SHA-256: edef95f63d40aad11bfa2ab26a188a364459186b1998540ac53f3cc1f6c5df16
font_01_sfnt_off00006146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6146 19344 bytes
SHA-256: aad58abc358693e9f779e1b44fbfcc691e602a59b48d28fb448562ebf11cf3ce

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