Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f8ec141cc66f38…

MALICIOUS

PDF

43.1 KB Created: 2021-05-11 17:02:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c5a6820bc2bbd1df930ffac809677b0a SHA-1: 82021e509ae56a34a0b94d7d44f210daff33ff35 SHA-256: 95f8ec141cc66f3865ae169cef25e8154db75d52e6b128a035d4407850a9e273
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to distribute malicious content. The primary URL points to a file claiming to be a Minecraft mod, which is a common lure for malware. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/minecraft-gun-mod-download-free-game-hack
    • http://www.sfakia-online.com/images/hacks-para-roblox_GM431946152.pdf
    • http://www.sfakia-online.com/images/coin-master-unlimited-spin-hack-apk_GM406889139.pdf
    • http://www.sfakia-online.com/images/coin-master-free-coins-no-human-verification_GM406889139.pdf
    • http://www.sfakia-online.com/images/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://www.sfakia-online.com/images/free-gold-cards-for-coin-master_GM406889139.pdf
    • http://www.sfakia-online.com/images/coin-master-blogspot-free-spins_GM406889139.pdf
    • http://www.sfakia-online.com/images/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • http://www.sfakia-online.com/images/free-spin-coin-master-today_GM406889139.pdf
    • http://www.sfakia-online.com/images/what-is-coin-master_GM406889139.pdf
    • http://www.sfakia-online.com/images/www-robux-com_GM431946152.pdf
    • http://www.sfakia-online.com/images/how-can-i-get-free-robux_GM431946152.pdf
    • http://www.sfakia-online.com/images/free-money-links-coin-master_GM406889139.pdf
    • http://www.sfakia-online.com/images/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://www.sfakia-online.com/images/free-spin-coin-master-2021_GM406889139.pdf
    • http://www.sfakia-online.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://www.sfakia-online.com/images/roblox-free-item-codes_GM431946152.pdf
    • http://www.sfakia-online.com/images/roblox-com-free-robux_GM431946152.pdf
    • http://www.sfakia-online.com/images/clean-master-hack-coins_GM406889139.pdf
    • http://www.sfakia-online.com/images/how-to-get-minecraft-for-free-on-computer_GM479516143.pdf
    • http://www.sfakia-online.com/images/free-robux-mobile_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bd2.bin
7d7d53e7417718f3c4d83d2616e2a71e52904bb317a90874d387e24474b33554		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD2 25136 bytes
font_01_sfnt_off000085a3.bin
a1a6f3ae66b5d922a0a4092004751a3e9c0d20fb317db8442b8cbfc32d6436e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A3 18428 bytes

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