Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80c7336ab3037aa…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 01:35:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: baa92a9f183adb49af4fda1cbace18fd SHA-1: 6424edcf7ea55837d146212d9875bdd522a49c48 SHA-256: c80c7336ab3037aa04ea6f2fa663ec10e5971cf32e81116a72edccdad39b94fb
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-online-hack-game-hack PDF link annotation
    • http://www.nfca.org.tw/upload/files/free-roblox-private-server_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/robux-offers_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-skins-in-counter-blox-roblox-offensive_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-gift-card-hack-paste-pin_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-hack-revealed_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/774-roblox-hack-discord_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-hack-roblox-2021-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-robux-2021_GM431946152.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_off000030d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D8 22984 bytes
SHA-256: f8dfc8e37f5eb0e9efd0b3de3950655f054067cafa9f74f811dc5ba0b0555002
font_01_sfnt_off00006472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6472 18080 bytes
SHA-256: fae27d4c4c2e952e6b547115e62f69cc1ea43df316298c73a3448a7f0ad6854c

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