Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc61361f8cd4900a…

MALICIOUS

PDF

41.6 KB Created: 2021-04-28 16:45:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2f63745694a3ed204b829ab3420e67f1 SHA-1: 1feeba419cd696ff1f91feae71227547565f0dd3 SHA-256: fc61361f8cd4900ac8b69c13531a296e68217918de23e7fa04003bdf04e5492d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks or generators for Roblox. The document body and embedded links strongly suggest a phishing or scam attempt to redirect users to malicious websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8575

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/how-to-get-a-free-domino-crown-on-roblox-game-hack In PDF document text
    • https://www.maquigon.com/ckfinder/userfiles/files/artmoney-pro-free-roblox.pdfIn PDF document text
    • https://www.maquigon.com/ckfinder/userfiles/files/youtube-roblox-robux-hacked.pdfIn PDF document text
    • https://www.maquigon.com/ckfinder/userfiles/files/roblox-epic-rap-battle-cheat.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
font_00_sfnt_off000038f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38F6 25904 bytes
SHA-256: 81e473ba9d674a8470551d0e33adffc50722218b142d6d6e28bcc590071e4e8a
font_01_sfnt_off0000747d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747D 3312 bytes
SHA-256: 40bd8eebcb3a0d68a8646f1930e84f30a44bfa48525263c6c528f0bc1e9c1677
font_02_sfnt_off00007fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCC 18764 bytes
SHA-256: 12c1c23d2a0cdd923d2a53723c89cec35fe3bb11c553f8a912534a40dbe3ce49

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