Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55e044116fd5806…

MALICIOUS

PDF

34.9 KB Created: 2021-07-08 00:19:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2a2da647d4a39b72cd2bde58526ef94b SHA-1: ed7a7853f27e75e3f05920971473438f8414bce3 SHA-256: f55e044116fd5806072608ce7329e7a8e1f5912b886a123a831caf35e9da4cec
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/406889139/coin-master-free-coins-2021-game-hack PDF link annotation
    • https://flyingchalks.com/ckfinder/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/tiktok-free-book-hack_GM835599320.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/free-roblox-steamy-xxx-videos-lol_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/roblox-free-bc-accounts-2021_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/45how-do-you-get-free-builders-club-on-roblox_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/coin-master--hack_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/hacks-for-rocitizens-on-roblox_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/free-clothing-roblox-group_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3359 22472 bytes
SHA-256: 07f426fe9e63fd155ef387759ee0e67dfa716b0fcc4201ee4bcb81f30458cb6f
font_01_sfnt_off00006571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6571 18400 bytes
SHA-256: 0cc69a54ece3ed14f72d45612a229cad946be49a09675100e3633ee455bac280

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