Malicious PDF — malware analysis report

Static analysis result for SHA-256 689c1de13397e49d…

MALICIOUS

PDF

35.3 KB Created: 2021-05-30 18:07:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d9c1ace80079642cb53371f071f2461e SHA-1: 6f3d638186dd40f502182061ee52925f68a71443 SHA-256: 689c1de13397e49dcc9857dcf0c8fe6f5377f7e2c341889cf2e1bb3bbd8212b9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector link that lures users with a 'free generator / game hack'. The document body explicitly contains the text 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the lure. The embedded URL leads to known malicious infrastructure, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-land-free-robux-game-hack In 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_002_off00002e0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E0C 25448 bytes
SHA-256: 248157694e6421c2c61c7aa6f1ea8607f7048dcb31854585f86a42c506b84f7f
font_01_sfnt_off0000681e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681E 18492 bytes
SHA-256: dd1922fe1cc281356c7e312f91778e191ebdc244bf13f8823862483f595251c7

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