Malicious PDF — malware analysis report

Static analysis result for SHA-256 400d5172b2941cf0…

MALICIOUS

PDF

44.1 KB Created: 2021-05-16 00:03:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f6ff0154ce992f30bcec39ac92d15a26 SHA-1: 001fed3656075570cfc7c0fb0beb7f1784db6d43 SHA-256: 400d5172b2941cf057c1b41a4fbdc9f42c20bd0b1b5d5c1c0ba5d088a367d546
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting game hacks and generators. The primary link, https://netcdn.xyz/app/406889139/coin-master-unlimited-spin-hack-apk-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/coin-master-unlimited-spin-hack-apk-game-hack In PDF document text
    • http://www.exikom.com.ua/images/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.exikom.com.ua/images/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.exikom.com.ua/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/wurst-18_GM479516143.pdfIn PDF document text
    • http://www.exikom.com.ua/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/how-to-hack-roblox-to-get-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_003_off00004913.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4913 23868 bytes
SHA-256: a8c09e3a7912d747b2aa28580b2c177aa116d8ad3573869143f53b5f79a0a13e
font_01_sfnt_off00007f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F45 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000088f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F7 18584 bytes
SHA-256: 1f0ff171152404fee35ded77e01b9724573d4b9224166749f75d1c5d7d8d4db8

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