Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd7b61a7f98fcee…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 08:14:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 76d42261c14788eaf65290ebca1a262c SHA-1: db5bde34b6de9c22f346226f3ef86b8510e07245 SHA-256: 5bd7b61a7f98fceebf21748599f804afe19055240fd17b676eb138c701b3058d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various game-related cheat and hack pages. One prominent URL, 'https://netcdn.online/app/406889139/how-do-i-get-free-coins-on-coin-master-game-hack', is directly referenced in the document body and heuristics. The presence of many external links suggests an attempt to manipulate search engine results or direct users to potentially malicious content, aligning with a spearphishing attachment tactic.

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/how-do-i-get-free-coins-on-coin-master-game-hack PDF link annotation
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-no-anti-bot-verification_GM431946152.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_off0000509a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509A 25452 bytes
SHA-256: 090eb4049e9ce0ea614c5af25370b77c8a9dce31bfed41835c6e9558e19ca01a
font_01_sfnt_off00008920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8920 18044 bytes
SHA-256: b0174b7273dd3697a995ce39da4c1069e2dc5f33a377c5b822b1ade397e01d0c

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