Malicious PDF — malware analysis report

Static analysis result for SHA-256 d585f5187ce73391…

MALICIOUS

PDF

46.7 KB Created: 2021-06-11 11:20:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cc1dd1f34dc9a27c8f662bcf55209350 SHA-1: 2d22b0d5b46ba4b0aa1c9d9f9640211c7273a14c SHA-256: d585f5187ce733912826cf2d9a11d0b5fd221f4e954111cd7dcd740339f0eba8
102 Risk Score

Malware Insights

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

The PDF contains a mass of external links disguised as game hacks and cheats, indicating a link farm designed to lure users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links to potentially harmful PDF files reinforces this assessment. The document body and embedded URLs suggest a phishing attempt related to game exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.tw/app/431946152/eyes-the-horror-game-update-2-alpha-hack-roblox-game-hack
    • http://brokermortgages.com/images/roblox-land-free-robux_GM431946152.pdf
    • http://brokermortgages.com/images/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://brokermortgages.com/images/blogger-coin-master-free-spins_GM406889139.pdf
    • http://brokermortgages.com/images/free-robux-hack-no-verification_GM431946152.pdf
    • http://brokermortgages.com/images/pokemon-go-free-team-change_GM1094591345.pdf
    • http://brokermortgages.com/images/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://brokermortgages.com/images/how-can-you-get-minecraft-for-free_GM479516143.pdf
    • http://brokermortgages.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://brokermortgages.com/images/minecraft-login-free_GM479516143.pdf
    • http://brokermortgages.com/images/free-robux-generator-no-verification_GM431946152.pdf
    • http://brokermortgages.com/images/free-coin-master-spin-app_GM406889139.pdf
    • http://brokermortgages.com/images/free-accounts-on-roblox-that-have-robux_GM431946152.pdf
    • http://brokermortgages.com/images/download-roblox-player-apk-free_GM431946152.pdf
    • http://brokermortgages.com/images/coin-master-hacks-android_GM406889139.pdf
    • http://brokermortgages.com/images/game-hacked-decal-roblox_GM431946152.pdf
    • http://brokermortgages.com/images/tiktok-viewer-free_GM835599320.pdf
    • http://brokermortgages.com/images/easy-robux-com_GM431946152.pdf
    • http://brokermortgages.com/images/omplete-surveys-for-coin-master-free-spins_GM406889139.pdf
    • http://brokermortgages.com/images/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://brokermortgages.com/images/boombox-roblox-free-catalog_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004d2c.bin
c9adcee96232a0bb3cfed561e86b2995386e6b31a5e42e5b0310d76f53c172e9
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D2C 25580 bytes
font_01_sfnt_off00008606.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8606 2824 bytes
font_02_sfnt_off00008fb5.bin
5edf6d52926c60f404c4604a53f7fa08d0f39d9073d4d84e0a1ae9dc49c6d121
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB5 19552 bytes