Malicious PDF — malware analysis report

Static analysis result for SHA-256 826d4215082b74a6…

MALICIOUS

PDF

33.8 KB Created: 2021-06-26 23:59:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ca4f0d7505bcaf7979e5f1ba3298f8cb SHA-1: a8e79856faa92bafb888017d5f503a5c4e92c60b SHA-256: 826d4215082b74a680171c943f178feec5a6a13355742342dc157eb5042b3d7d
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 are related to game hacks and cheats, indicating a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or scams, aiming to trick users into downloading malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-script-hack-game-hack
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-hack-players-on-roblox-2021_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-robux-apps-that-work_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/hackear-prison-life-roblox-2021-pc_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-hack-online-android_GM406889139.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-hilton-hotels-interview-hack_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-robux-mobile_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-free-spins-apk-2021_GM406889139.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-key-free-spin_GM406889139.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/tryrbx-site-free-robux_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-hack-coin-master-game-without-root_GM406889139.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-promocode-hack_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-hack-in-not-so-bizarre-adventure-roblox_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/minecraft-free-download-no-virus_GM479516143.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/lots-of-robux_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-robux-app-on-pc_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-hack-roblox-games_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-robux-pointsprizes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ee8.bin
9f0d6d6ee3fb2171ce51c7796e45f49a08a6f98445c2def89e6a57979c9e7aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE8 21556 bytes
font_01_sfnt_off00005e4d.bin
b4406d9a9655630c491d503bd4edf1533556f3b48b71901c44dd71e690106ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4D 19288 bytes

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