Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a57b3f6f34064d…

MALICIOUS

PDF

44.2 KB Created: 2021-05-16 16:02:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3849588cdbd2ad4db142df7aa55aff1a SHA-1: d0f845552468ae30c961f6a2df4d4cd2e98e6433 SHA-256: 02a57b3f6f34064dda595a95fa77cb1d1562d21cd4e1abf1b6fb54c88e92f859
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links to external websites, many of which are presented as game hacks and cheats for popular games like Minecraft and Coin Master. The presence of a large number of these links, coupled with the ML classifier flagging it as malicious, indicates a likely attempt to lure users into downloading potentially unwanted or malicious applications. The document body itself contains obfuscated text and URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • 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.
  • 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-pocket-apk-game-hack
    • http://gc-sistemas.com.ar/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://gc-sistemas.com.ar/images/coin-master-invite-friends-hack_GM406889139.pdf
    • http://gc-sistemas.com.ar/images/coin-master-hack-apk-download_GM406889139.pdf
    • http://gc-sistemas.com.ar/images/free-robux-codes-2021_GM431946152.pdf
    • http://gc-sistemas.com.ar/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://gc-sistemas.com.ar/images/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdf
    • http://gc-sistemas.com.ar/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • http://gc-sistemas.com.ar/images/free-robux-quiz_GM431946152.pdf
    • http://gc-sistemas.com.ar/images/coin-master-hack-apk-ios-download_GM406889139.pdf
    • http://gc-sistemas.com.ar/images/how-to-get-free-robux-youtube_GM431946152.pdf
    • http://gc-sistemas.com.ar/images/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • http://gc-sistemas.com.ar/images/i-want-free-robux_GM431946152.pdf
    • http://gc-sistemas.com.ar/images/free-robux-com_GM431946152.pdf
    • http://gc-sistemas.com.ar/images/abd-roblox_GM431946152.pdf
    • http://gc-sistemas.com.ar/images/minecraft-client-download_GM479516143.pdf
    • http://gc-sistemas.com.ar/images/coin-master-free-spins-8-14-2021_GM406889139.pdf
    • http://gc-sistemas.com.ar/images/how-can-u-get-free-robux_GM431946152.pdf
    • http://gc-sistemas.com.ar/images/coin-master-daily-free-coins-link_GM406889139.pdf
    • http://gc-sistemas.com.ar/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
    • http://gc-sistemas.com.ar/images/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a3d.bin
2c2623b220df37842ae82a2d8f228846eaa873a2ab626156f59dc09bec28cc88
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3D 23944 bytes
font_01_sfnt_off00008091.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8091 2912 bytes
font_02_sfnt_off00008a8d.bin
43fabaa7baa2069dea089d396f6a12271a87df7a231cffc83c7f5458ac3d8eee
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8D 18208 bytes