Malicious PDF — malware analysis report

Static analysis result for SHA-256 164e85b239184d80…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 22:13:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 02ceeb7e4a14b474d97a6ee494763aea SHA-1: adae9bcaa5d9d2ebfd3e12b751f46b1d7d4b6333 SHA-256: 164e85b239184d80d1e29b24bbb1b28861d196f9484fed69a742c8d23caf122d
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 generator / game hack" lures. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-skins-girl-free-download-game-hack. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful websites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-skins-girl-free-download-game-hack In PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/robux-free-2021-sans-verification-humaine_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/roblox-free-danlod_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/i-robux_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/roblox-person_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-bypass-cheat-engine-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/inf-currency-in-roblox-games-hack_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/roblox-cheat-engine-table-and-bypass-2021_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000319b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319B 21948 bytes
SHA-256: b4e9b34fb8b3cbdb41ceabf8762ec576cdc6c4b4b4f640432414f49605c3a5a5
font_01_sfnt_off0000623a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 19444 bytes
SHA-256: 34c2adf4c39b6d735bff1811d58c0c6d28a367dca0ea90f1e5c345b04046208d

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