Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3f7186315e3dba…

MALICIOUS

PDF

48.3 KB Created: 2021-06-10 21:52:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 652d5e641c292edafcb2689267564a15 SHA-1: d10369d86c79b92cbb4b148eae74390922df01a9 SHA-256: ca3f7186315e3dba0fad98553e3cb9e07379b4e92dfdba2b78998a46f7cf158c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors and game hack lures, indicating a phishing or scam attempt. The primary malicious link identified is https://netcdn.tw/app/431946152/do-illegal-aliens-get-anything-free-on-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/do-illegal-aliens-get-anything-free-on-roblox-game-hack In PDF document text
    • http://immo360grad.com/images/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/www-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/funny-roblox-outfits-and-free-outfits_GM431946152.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_004_off0000510e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510E 25776 bytes
SHA-256: 52f22ed0075b1cd2b90535c3b6202eb36e6ea5fd5accd45ad64d0a28a661e8c2
font_01_sfnt_off00008d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D48 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00009745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9745 19204 bytes
SHA-256: e2468df057e852baa10a6279bc831cc013fb85c924092eb00f882e83583cdb5f

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