Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc172edd3dac0f5…

MALICIOUS

PDF

44.5 KB Created: 2021-05-13 16:15:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cb648d518d814e2b3164150f86c8d599 SHA-1: f7ce5d2d1cd5b99beeb3a6edf53fbf62ed4269b1 SHA-256: cdc172edd3dac0f52fd117b7b7dc8b6ec0df181f95978a3fcc9ee8e8e22245fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, specifically designed to lure users with promises of free in-game currency. The ML classifier also flagged this PDF as malicious. The document body and heuristics indicate a phishing or scam attempt, likely to deliver further malware or collect credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/free-coin-master-spins-links-2021-game-hack In PDF document text
    • https://omhelsjehart.nu/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/10-robux_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-flip-master-coins_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_003_off00004a20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A20 24124 bytes
SHA-256: 24fbbc568ad0b192b974dacb8cd2db0f37da2c3261868af10af8fcb53ee798e6
font_01_sfnt_off00008128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8128 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADA 18456 bytes
SHA-256: 1df78224994ee43a22d89536079f46dbccffe913f4ec8075feb5eac5cb57a7db

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