Malicious PDF — malware analysis report

Static analysis result for SHA-256 37725f0370f973cb…

MALICIOUS

PDF

43.5 KB Created: 2021-05-19 02:09:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1e9086c0fd9621b5951b5c22effcc6be SHA-1: e33a627e62d70344b915c9097337c175d1541413 SHA-256: 37725f0370f973cb2172aebce0bc9a25eac1b4f810b91e6fd24942eaadd77ec7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO spam tactic. The document body mentions 'free robux' and 'game hack', suggesting a lure for potentially unwanted or malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest this document is part of a campaign to drive traffic to external sites, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/free-roblox-accounts-with-robux-that-work-2021-game-hack
    • http://pwpyemen.org/images/ww-roblox-come_GM431946152.pdf
    • http://pwpyemen.org/images/master-free-spins-and-coins_GM406889139.pdf
    • http://pwpyemen.org/images/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://pwpyemen.org/images/free-robux-generator-without-human-verification_GM431946152.pdf
    • http://pwpyemen.org/images/coin-master-free-spins-2021-hack_GM406889139.pdf
    • http://pwpyemen.org/images/coinmaster-blogspot_GM406889139.pdf
    • http://pwpyemen.org/images/minecraft-on-computer-free_GM479516143.pdf
    • http://pwpyemen.org/images/coin-master-game-free-play-online_GM406889139.pdf
    • http://pwpyemen.org/images/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • http://pwpyemen.org/images/coin-master-hack-online-pc_GM406889139.pdf
    • http://pwpyemen.org/images/haktuts-coin-master-today_GM406889139.pdf
    • http://pwpyemen.org/images/coin-master-hacks-free-spins_GM406889139.pdf
    • http://pwpyemen.org/images/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdf
    • http://pwpyemen.org/images/how-to-get-free-robux-com_GM431946152.pdf
    • http://pwpyemen.org/images/free-minecraft-codes_GM479516143.pdf
    • http://pwpyemen.org/images/coin-master-free-coins-link_GM406889139.pdf
    • http://pwpyemen.org/images/robux-hack-2021_GM431946152.pdf
    • http://pwpyemen.org/images/free-robux-codes-2021_GM431946152.pdf
    • http://pwpyemen.org/images/coin-master-hack-without-human-verification-india_GM406889139.pdf
    • http://pwpyemen.org/images/free-robux-no-verification-2021-android_GM431946152.pdf
    • https://www.bandicam.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b10.bin
7284f1ee118a82f81dc6a73f4b416f05a7becf57b6f0de2331adfc7d233e2933
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B10 24788 bytes
font_01_sfnt_off0000841d.bin
4c7cb67921980cc467a624d7be0aa4f8f19dcdcb8d4cb789adc94de6f70366aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x841D 19476 bytes