Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef4746364dd0239d…

MALICIOUS

PDF

41.7 KB Created: 2021-05-20 13:36:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 90eab50d6ad3deb98ee3c4db889396db SHA-1: 1c7d03215da44e5a5d3740b25275c2851d53d590 SHA-256: ef4746364dd0239d8f76010df089dd1d6d55dc4eb9efd24df7f9ca5e16440307
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generators' for popular games. The ML classifier also flagged the PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the lure of free game items strongly suggest an attempt to redirect users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7466

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/free-roblox-website-game-hack In PDF document text
    • https://www.appartamenticroazia24.com/images/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/robux-boost_GM431946152.pdfIn PDF document text
    • https://www.appartamenticroazia24.com/images/coin-master-hack-no-download_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_off00003632.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3632 28480 bytes
SHA-256: 80d72a37d94514d085f373000dde378e392fe4a9db5c6ae0c5b67cd6db43d71c
font_01_sfnt_off000074bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BC 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8163 18372 bytes
SHA-256: 4f49704c3d2016fd3d486e698c5af7a9a5561cf776b84bb9dfcb3ffa887994c7

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