Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfeea79a0b861135…

MALICIOUS

PDF

37.2 KB Created: 2021-05-25 08:07:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5bc3df8ccba71e19c5f2b21bf4303b50 SHA-1: 56ca33541c8f8ec67e00cc232d101a8a67afa896 SHA-256: cfeea79a0b861135bc6076ebbc9ffca5e93ca9fa8f60799bb3d56bb0997040b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and 'free generators'. The document body and embedded links suggest a lure to trick users into downloading potentially unwanted or malicious software. No scripts were extracted, but the presence of malicious links and the lure indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7095

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/835599320/how-to-get-free-tiktok-likes-game-hack In PDF document text
    • https://kojak-group.com/userfiles/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-hack-roblox-accounts-for-robux_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_002_off00002e98.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E98 24876 bytes
SHA-256: 21796e7a76109f1e978f629f759acec01eb01d3c4922164a305548bfc92edffe
font_01_sfnt_off000067ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BA 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off000071c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C9 17620 bytes
SHA-256: 741fb2b5b30d8c36687485fbf08913b92fc3b4be4da5bff93af7320c30ccb52b

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