Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8600e81a3481521…

MALICIOUS

PDF

45.6 KB Created: 2021-05-14 22:22:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 183e8e469105754fff0b60f3c52af61c SHA-1: f15ee377044ef59fddf4234bc1575cf5b9ab6d73 SHA-256: b8600e81a3481521a3547df9270834c4f68e59e2234141daf2ac39851899e971
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a "Coin Master Hack Program" and embeds multiple links pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-program-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content or downloads, aligning with a phishing or scamming attack pattern.

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 https://netcdn.xyz/app/406889139/coin-master-hack-program-game-hack In PDF document text
    • http://infoagronomia.com.ar/images/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/picture-roblox_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/free-gold-cards-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
stream_003_off00004879.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4879 32840 bytes
SHA-256: f5d003cc08bab6a2eb3a0638b69e46b7c06cc5cadbfd54073d1941f81d23dab6
font_01_sfnt_off00008ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF9 18416 bytes
SHA-256: 9b1b86d518bbcbecce2ac7037f2b10fa6fa9b3d2e28cf0c2cd03817ae8459785

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