Malicious PDF — malware analysis report

Static analysis result for SHA-256 11894fd2b7ad7356…

MALICIOUS

PDF

42.0 KB Created: 2021-05-20 21:17:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 83b6dcea6d45dbaf7c73645e18772c57 SHA-1: 17c48008edac333938cf13dd4149e94247cfaab9 SHA-256: 11894fd2b7ad7356b6f4438cadb602e5f6acac8e84861c27ffc3e47b6dd17e99
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 0.7290

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/431946152/how-to-hack-someone-on-roblox-game-hack PDF link annotation
    • http://alpen-seeblick.at/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://alpen-seeblick.at/images/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://alpen-seeblick.at/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://alpen-seeblick.at/images/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://alpen-seeblick.at/images/free-spins-in-coin-master-without-human-verification_GM406889139.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_off00003a2a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A2A 26160 bytes
SHA-256: 44155420d44ad4da4d20ea8a58250550560f06c168c13bc6869159e46b16ab9e
font_01_sfnt_off000077b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B9 2956 bytes
SHA-256: 3acb1953cd6e12ae7739d2a2a4a4364a7837dc02ec385ccd2ceaf0df73d156fc
font_02_sfnt_off000081fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FA 18608 bytes
SHA-256: eebf4fd0ce8e014a693b7448b6f63c7fd528199174cddc1a90a23252bff1a633

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