Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc5201b851654c2…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 19:37:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 357c818c924e98edbfa823ea1c6e1bb8 SHA-1: ded8db584b77c2ea855f640d67b43c4db58a65cb SHA-256: afc5201b851654c213e7c75397bd96969090da98bf4b7beb4598a80fcbc4c72f
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on domains related to game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a tactic to distribute malicious content or redirect users to phishing sites. The ML classifier also strongly flagged this PDF as malicious.

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.tw/app/406889139/coin-master-ios-hack-game-hack PDF link annotation
    • http://perpus.poltekeskupang.ac.id/repository/command-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-hack-scripts-for-children_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-tiktok-likes-no-human-verification_GM835599320.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-free-admin-how-spawn-overseer_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/rixty-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-accounts-with-robux-that-work-october-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/is-there-any-virusfree-script-executor-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/hack-peoples-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/rbx-com_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/boss-fighting-stage-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-bee-swarm-simulator-free-diamond-eggs-codes_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B2 23320 bytes
SHA-256: a14e941fc4be4b6919b8e878ac089e4f3f023d989926827b8f8867b414c5281f
font_01_sfnt_off00006794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6794 18004 bytes
SHA-256: 9ff53ad4fb27c506b8f8fb38b1722763e42d939b653958544d298b579284f01c

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