Malicious PDF — malware analysis report

Static analysis result for SHA-256 7baacc869e4ec9be…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 07:17:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bbca0c5e8fcf70dea1403bc2889f0728 SHA-1: 94b6c88bfbca6228cef2e15f77d87220860386a4 SHA-256: 7baacc869e4ec9be682d62d0556e2fb46a7841159339147ae4f999c994402cdc
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 appear to be part of a link farm designed to attract users with lures like 'free spin link coin master game hack'. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' lure further supports a malicious intent. The primary goal appears to be directing users to potentially harmful content or phishing sites.

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.online/app/406889139/free-spin-link-coin-master-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/pokemon-go-free-coins-hack_GM1094591345.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/without-pokemon-go-free-incense_GM1094591345.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-links-free-spins_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_004_off0000510a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510A 24084 bytes
SHA-256: fa3bb324aaf8434a170ee2201eb06dab967403c45169738d294ece98f9b592e8
font_01_sfnt_off00008809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8809 18056 bytes
SHA-256: 5e0e5252c5991e876b89620e8fc451db275611f7bed2c8d0b16d9c89ed4fe559

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