Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ffaf7678db06ecc…

MALICIOUS

PDF

44.2 KB Created: 2021-05-16 02:09:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 41358f7d50671c84abdc7d4031c2426d SHA-1: aa9beacdc19573b44a52778b1c0be7dcccb2ded1 SHA-256: 3ffaf7678db06eccb5921d340cfee80945cb981a32293f29f6479aa75d9e947a
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 0.9648

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 https://netcdn.xyz/app/406889139/coin-master-cards-hack-2021-game-hack PDF link annotation
    • https://www.lomrad.go.th/images/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.lomrad.go.th/images/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • https://www.lomrad.go.th/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://www.lomrad.go.th/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.lomrad.go.th/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • https://www.lomrad.go.th/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.lomrad.go.th/images/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://www.lomrad.go.th/images/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.lomrad.go.th/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.lomrad.go.th/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.lomrad.go.th/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://www.lomrad.go.th/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.lomrad.go.th/images/roblox-re_GM431946152.pdfIn PDF document text
    • https://www.lomrad.go.th/images/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • https://www.lomrad.go.th/images/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.lomrad.go.th/images/roblox-download_GM431946152.pdfIn PDF document text
    • https://www.lomrad.go.th/images/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://www.lomrad.go.th/images/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.lomrad.go.th/images/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • https://www.lomrad.go.th/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A8 24264 bytes
SHA-256: ff0e40b8e64422bb2cb9bb6547633dc3f25f28e184c93da1cd7830f12d804b66
font_01_sfnt_off00007fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCF 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000089b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B9 18292 bytes
SHA-256: 56ed892f9c960ec28c91726eeb440a92294fcef820bc23b96874e10d7a9d3574

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