Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7a3859fbabc644…

MALICIOUS

PDF

35.3 KB Created: 2021-06-28 14:09:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cc9649b9d5edf6575cd99d2fc722634a SHA-1: 3b2cc3406a344165eab527601f9ce4993dd2b5c7 SHA-256: cd7a3859fbabc64418009e32e9c1a6cf41e7e9699b181da84fdb9643f8bb1a05
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.co', which is flagged as a malicious redirector. The document body and heuristics indicate a lure for free Robux or game hacks, a common social engineering tactic. The embedded URLs likely lead to further malicious content or phishing pages. No scripts were extracted from this sample.

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/free-robux-no-human-verification-2021-no-download-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-cheats-for-pc_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-admin-games-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/earn-robux-com_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-glitch-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/everythings-free-roblox-mm2-uncopylocked_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-song-i-want-to-break-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robux-command-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/can-i-download-minecraft-for-free_GM479516143.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_off000030d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D5 21812 bytes
SHA-256: 878504ad5e8af02d8d314bb5d7b07fdcd6d69e7d401e673ea7d77663c9c44f44
font_01_sfnt_off00006104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6104 20316 bytes
SHA-256: 90e60bcf847791c6ac3e1add53ad4a6a0ad65a4a41ffaaa6b8b9f03572550ec2

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