Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79fee2ef7bb0cc7…

MALICIOUS

PDF

41.2 KB Created: 2021-05-01 22:21:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 84b9368c0b3725e0dba50eb1754c30a0 SHA-1: 0378b6e530fd916d6b99bdd2adcf8042f2ecd167 SHA-256: f79fee2ef7bb0cc73455ca620823b0de79eb254557f30c3648425f578c019b88
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure related to game hacking and free in-game currency to entice users. It contains multiple embedded URLs that redirect to sites offering "generators" or "hacks", which are likely malicious. The document body and heuristics strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/roblox-how-to-hack-rpg-games-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/free-robux-geerator.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-builder-club-free-code.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/now-speed-hack-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-generator-easy-verification.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-without-verification-or-survey.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-pastebin-2021.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-denis-shirt-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-skyline-hack.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-roblox-computer.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-make-shirts-free-on-roblox.pdfIn 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_off00003f4f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F4F 27208 bytes
SHA-256: e0dfa6f5e044883f890c4d5096638308ebbc23aa78332a5bb9e6e63e51b6d482
font_01_sfnt_off00007cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAC 19072 bytes
SHA-256: 5c8646e4b174cdbddb79695b47d87cdfd19f228409717e924975e77200b8f623

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