Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f19624e95c883bd…

MALICIOUS

PDF

42.8 KB Created: 2021-06-03 08:39:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5d62f46ea872ace0395616350899b76e SHA-1: 68473d40376de3d7a2aaff22034311d582ed14d3 SHA-256: 9f19624e95c883bd4026e18026726edcd6445ee8c5404add87403180f864310b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to SEO-optimized PDF files hosted on various domains, suggesting a link farm or content aggregation tactic. One prominent URL, 'https://netcdn.online/app/406889139/coin-master-free-spins-ios-app-game-hack', is directly embedded, likely serving as a lure for users to download or access further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/coin-master-free-spins-ios-app-game-hack
    • http://libsmpn1balongpo.sch.id//repository/how-to-win-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/hack-coin-master-pc_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id/repository/minecraft-java-code-free_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id/repository/roblox-online-play-hack-for-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/download-minecraft-java-edition-free_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-earn-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-no-human-verification-generator_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-change-roblox-username-for-free_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/minecraft-coins-free_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-on-computer_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/hack-xp-net-coin-master_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/minecraft-wurst-client_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-thumbnail_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-no-verification-at-all_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-ways-to-get-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/minecraft-windows-10-edition-free_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-admin-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f81.bin
7867a9dd02160e25185819d3b11399c867a832934f345fdd7da13c025668dd0b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F81 23900 bytes
font_01_sfnt_off000085af.bin
dc4be9eca4043c451860dc040d84e7fc0527576754fa5be74ed410eba2640189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AF 17884 bytes

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