Malicious PDF — malware analysis report

Static analysis result for SHA-256 d520bb6f148dcb85…

MALICIOUS

PDF

44.0 KB Created: 2021-06-08 17:57:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 625b5aff834ae0ec42eb582a68b0740c SHA-1: e4fcfb864c97cb24e1a762366f283ce0662fe6d1 SHA-256: d520bb6f148dcb85cc3411c8ca4b2aaad534c60bab4f9a7828f60fa7b03a4de7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The ML classifier and PDF link farm heuristic indicate malicious intent, likely to redirect users to sites offering fake in-game items or currency. The presence of embedded URLs points to the document's role as a lure, potentially leading to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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/free-accessories-on-roblox-game-hack
    • http://perpus.masda.ac.id/repository/pubg-uc-generator-without-verification_GM1330123889.pdf
    • http://perpus.masda.ac.id//repository/easy-robux-today-com_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdf
    • http://perpus.masda.ac.id//repository/free-links-for-coin-master_GM406889139.pdf
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-today-daily-links_GM406889139.pdf
    • http://perpus.masda.ac.id//repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/games-that-give-free-robux_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/750-robux-free_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/how-to-get-free-roebucks-without-verification_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/hack-coin-master-pc_GM406889139.pdf
    • http://perpus.masda.ac.id//repository/coinmaster-spins_GM406889139.pdf
    • http://perpus.masda.ac.id/repository/coin-master-pet-food-hack_GM406889139.pdf
    • http://perpus.masda.ac.id//repository/how-to-get-free-roblox_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/bloxpink-free-robux_GM431946152.pdf
    • http://perpus.masda.ac.id//repository/free-t-shirt-roblox_GM431946152.pdf
    • http://perpus.masda.ac.id//repository/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://perpus.masda.ac.id//repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/free-robux-no-gift-card_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdf
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00004875.bin
62c16aeb5d21c5a1dc60dc03699d0dcdcf5f57ff44584bca09ddc0085ca2adcc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4875 24752 bytes
font_01_sfnt_off000080f2.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F2 2832 bytes
font_02_sfnt_off00008aa2.bin
ad304bf3f0d64eb6e2c096b4eead78df75db571621da48256dd54ef5fc6e76c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA2 18068 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.