Malicious PDF — malware analysis report

Static analysis result for SHA-256 a113f185e4c75f12…

MALICIOUS

PDF

49.3 KB Created: 2021-05-15 14:31:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a3c00645c000afd8b86d15b4bd24ccf0 SHA-1: 45cd40b3306dee7c77a8e259717d446be0961b2c SHA-256: a113f185e4c75f12f3c6415a15d2cac1431181f79c0b5eacec61e080ac1cc4b0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which appear to be related to game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting an attempt to drive traffic to potentially malicious content. The ML classifier also flagged the PDF as malicious. While no scripts were explicitly extracted, the presence of embedded links and the nature of the content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/how-to-hack-people-on-roblox-game-hack
    • http://hcberg.com/images/http-appsmob-info-coin-master-hack_GM406889139.pdf
    • http://hcberg.com/images/coin-master-spin-hack_GM406889139.pdf
    • http://hcberg.com/images/coin-master-unlimited-spin-hack_GM406889139.pdf
    • http://hcberg.com/images/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://hcberg.com/images/minecraft-hax-download-no-virus_GM479516143.pdf
    • http://hcberg.com/images/free-robux-gift-card-codes_GM431946152.pdf
    • http://hcberg.com/images/coin-master-20-free-spins-link-2021_GM406889139.pdf
    • http://hcberg.com/images/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdf
    • http://hcberg.com/images/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • http://hcberg.com/images/coin-master-free-spins-1701-20_GM406889139.pdf
    • http://hcberg.com/images/coin-master-hacker-club_GM406889139.pdf
    • http://hcberg.com/images/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://hcberg.com/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • http://hcberg.com/images/get-free-robux-now_GM431946152.pdf
    • http://hcberg.com/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdf
    • http://hcberg.com/images/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://hcberg.com/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdf
    • http://hcberg.com/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://hcberg.com/images/robux-2021_GM431946152.pdf
    • http://hcberg.com/images/rblx-city-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c45.bin
c383846b2828e48440c4417df263aad862cbb1d6d41b704ea4b5ddee3f5cd60d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C45 33100 bytes
font_01_sfnt_off00009121.bin
8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9121 3464 bytes
font_02_sfnt_off00009d57.bin
9439cdf519c477105af26a237b903c28353edd649090bb99f856962d56c9ecd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D57 18676 bytes

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