Malicious PDF — malware analysis report

Static analysis result for SHA-256 46cfc25874c8a2d8…

MALICIOUS

PDF

43.8 KB Created: 2021-06-11 00:56:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ce20b1515043600ac4012c72128e0a3a SHA-1: 30b5180a541e14cb768f7fad31024a4f7b0db831 SHA-256: 46cfc25874c8a2d8cbf941bed8a342126028b96fd0ae0c3be12ec0f951f525cd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm designed to attract users searching for game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs points towards a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/roblox-northern-frontier-how-to-hack-pounds-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/infinite-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-maniac-free-catlog-bookmarks_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/big-brother-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/synapse-download-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.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_004_off00004d29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D29 24880 bytes
SHA-256: 91271d4e2bd4ec3b0200a7516cb5e101de8abb6fb6e2beaf496dffd17020f5e7
font_01_sfnt_off00008573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8573 19368 bytes
SHA-256: d8e173b1c24e3a5d88e94117e13bbd621e4b37725b623792a41b74f31e30a9e2

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