Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03ab47518e4e3ee…

MALICIOUS

PDF

41.7 KB Created: 2021-04-23 18:21:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5a6ae3daf0c72286ff30f77a7d1f44c6 SHA-1: b74f8737ee36ac6f775474622d6229a54fbbe9c2 SHA-256: f03ab47518e4e3eea84f5b6bc1c643aa4fcd2c4824eb00eee7aea6fee0973553
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 0.9941

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://netsecure.top/app/431946152/how-to-get-free-robux-without-surveys-game-hack PDF link annotation
    • http://bwharrisalumniusa.org/images/how-to-get-free-robux-on-roblox-ipad-2021.pdfIn PDF document text
    • http://bwharrisalumniusa.org/images/how-to-hack-alone-batle-royale-with-roblox.pdfIn PDF document text
    • http://bwharrisalumniusa.org/images/roblox-all-free-items-2021.pdfIn PDF document text
    • http://bwharrisalumniusa.org/images/new-free-roblox-hack-rtfsplorer-level-7-explorer-op-hack.pdfIn PDF document text
    • http://bwharrisalumniusa.org/images/roblox-hacks-and-cheats-and-keygen.pdfIn PDF document text
    • http://bwharrisalumniusa.org/images/codigo-oculto-roblox-hack-roblox-tener-robux-gratis-2021-noviembre.pdfIn PDF document text
    • http://bwharrisalumniusa.org/images/how-to-download-wall-hacks-on-roblox.pdfIn PDF document text
    • http://bwharrisalumniusa.org/images/how-to-hack-roblox-on-ios.pdfIn PDF document text
    • http://bwharrisalumniusa.org/images/fps-hacks-roblox-aimbot-how-to-activate-ambot.pdfIn PDF document text
    • http://bwharrisalumniusa.org/images/how-to-get-free-robux-no-hack-may-2021.pdfIn PDF document text
    • https://robux-rank.comIn 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
stream_003_off00004267.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4267 26356 bytes
SHA-256: de1372371bcd469f8c3cd6f44e9d3c4716dbb40512e0a3c349b04ea764ea103b
font_01_sfnt_off00007f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F15 19060 bytes
SHA-256: 402aebe8c34fdbdb56c6d5ac0c879f316ccc47677bd032b34ef61ae0ac5a4f59

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