Malicious PDF — malware analysis report

Static analysis result for SHA-256 86cfa0e0600d893b…

MALICIOUS

PDF

37.9 KB Created: 2021-05-21 06:01:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0edd82eafc1518d93035be4c5d374c3e SHA-1: 52659ec9f56226b75a8b450c7312ce8b9a9197f6 SHA-256: 86cfa0e0600d893b53d7c800d7b1055f024b39670dbcdcddd48ccb31c08482eb
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 0.7010

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/835599320/free-tiktok-likes-without-verification-game-hack PDF link annotation
    • http://www.readandenjoy.ae/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/roblox-promo-codes-free-robux_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_002_off000030d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30D6 24328 bytes
SHA-256: e35bc345ff86a92379cb071db9cbd8d959eaac4ada9e5fd8fbf48203bc6b67cd
font_01_sfnt_off000068a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A5 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7290 18324 bytes
SHA-256: 2890867b549cf671f2c98eef92adc8de00a1acce0cbbf08ac1c0ae5a6c34295b

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