Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c240f70e6338b60…

MALICIOUS

PDF

39.7 KB Created: 2021-05-22 09:10:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bac5bd220788096b48e9a03cd0919c6b SHA-1: 710c1355ccbb0e65c52657bf56880a319e39a6de SHA-256: 5c240f70e6338b607dd060896b2e349741ba976c69413b4ecc76c0f944450c92
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to 'Roblox Hack Com' and 'free generator' to entice users. It contains multiple embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body also contains a call-to-action phrase, reinforcing the deceptive nature of the file. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-hack-com-game-hack In PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/daily-free-spins-for-coin-master_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_off00003267.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3267 25544 bytes
SHA-256: 53495d5359c7116647560e3e9d00de8ff7f3a093c27ed147a2d722aa8e03f02f
font_01_sfnt_off00006de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE6 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00007910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7910 18440 bytes
SHA-256: 92e56247950081f5f8ea935637ec6d93dafa31aa334148af106ab9a8365bd2e0

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