Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc785088f7f339c4…

MALICIOUS

PDF

46.1 KB Created: 2021-05-17 06:01:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 06af1a4d7973bf83990d47a8740539d1 SHA-1: 58cb696d2a34689aaedcd0333c63a2f5b50328d2 SHA-256: cc785088f7f339c499105775ea4e8c2a4d681283f5937c213fc967dcfa98bb34
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 disguised as direct downloads for popular games. The ML classifier and the PDF link farm heuristic indicate malicious intent. The document body and embedded links suggest a lure for free game items, likely leading to phishing or malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/free-promo-codes-for-coin-master-game-hack
    • http://brokermortgages.com/images/roblox-free-hats_GM431946152.pdf
    • http://brokermortgages.com/images/coin-master-free-spins-2021-haktuts_GM406889139.pdf
    • http://brokermortgages.com/images/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • http://brokermortgages.com/images/coin-master-free-download-for-pc_GM406889139.pdf
    • http://brokermortgages.com/images/coin-master-apk-mod-free-download_GM406889139.pdf
    • http://brokermortgages.com/images/free-minecraft-alt-generator_GM479516143.pdf
    • http://brokermortgages.com/images/robux-generator-no-human-verification_GM431946152.pdf
    • http://brokermortgages.com/images/roblox-lovenet_GM431946152.pdf
    • http://brokermortgages.com/images/100-free-coin-master-spins_GM406889139.pdf
    • http://brokermortgages.com/images/robux-prices_GM431946152.pdf
    • http://brokermortgages.com/images/coin-master-hack-quora_GM406889139.pdf
    • http://brokermortgages.com/images/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://brokermortgages.com/images/como-hackear-coin-master-espaol_GM406889139.pdf
    • http://brokermortgages.com/images/free-coins-coin-master-hack_GM406889139.pdf
    • http://brokermortgages.com/images/how-to-coin-master-hack_GM406889139.pdf
    • http://brokermortgages.com/images/how-to-get-free-roblox-premium_GM431946152.pdf
    • http://brokermortgages.com/images/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • http://brokermortgages.com/images/scaffold-minecraft-hack_GM479516143.pdf
    • http://brokermortgages.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://brokermortgages.com/images/coin-master-get-free-cards_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ed.bin
1b005643ac47c26d3fc009f25e121971b0c55f326024b613f77403577b794bb3
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49ED 27076 bytes
font_01_sfnt_off0000881c.bin
96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
pdf-font-stream PDF embedded font (sfnt) at offset 0x881C 2820 bytes
font_02_sfnt_off000091bd.bin
746e171d2ae2ee44530a07cf254fc2080fa675031ecc49e9e6798833521e600e
pdf-font-stream PDF embedded font (sfnt) at offset 0x91BD 18296 bytes