Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fffdd36537fbb9a…

MALICIOUS

PDF

48.1 KB Created: 2021-05-13 08:14:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0c1b525950652b851c60a190092a64ca SHA-1: abbf6a285dc1fa3d91d0568bcafd91e5c2a5c775 SHA-256: 4fffdd36537fbb9a1165ebd9928eb60378c6507a97b1001b8a2968b2c539821e
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 0.8715

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/daily-free-spin-link-for-coin-master-game-hack PDF link annotation
    • http://educhina.mn/editor/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/instant-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b3d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3D 25716 bytes
SHA-256: cc2fca9dba78e59d04ab50739ad64eb9fa0610a2bf3bd2436a067002fb48e9ac
font_01_sfnt_off00008487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8487 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E28 18476 bytes
SHA-256: a1e2d053ddd827b51a873b4daf81e699df0b3bac0bfbdaf6be5e73db52a20702
font_03_sfnt_off0000b0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B4 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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