Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27f68a1ea8860c3…

MALICIOUS

PDF

34.3 KB Created: 2021-06-29 19:24:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9eac8a36710286ae31594331285c9a6b SHA-1: a5bac3fb13f58e1a939e3f45358632a7e0c9934f SHA-256: c27f68a1ea8860c31a6a189aa6ca59fd808251dab4f7bfb2b33b5d5dfa48bb37
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are presented as 'SEO link farms' and offer game cheats or hacks. The document body and extracted URLs suggest a lure to download or access further content, likely malicious. The ML classifier also strongly indicated maliciousness.

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.co/app/431946152/cobalt-wings-free-roblox-game-hack
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-hack-tool-apk-download_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-coin-master-spins-daily_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-cheat-in-roblox-mad-city_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/rob-hacker-robux-generator_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-robux-cards_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/daily-free-spin-coin-master-link_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/admin-vs-hacker-roblox-1_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/teach-me-to-hack_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-robux-reddit_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-free-spins-that-really_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-role-in-coin-master_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-free-spins-link-ios_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/100-free-spins-on-coin-master_GM406889139.pdf
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/roblox-free-clothes-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003183.bin
3f189d3a803ac0413053e2d678356ccb8f8c3079916066b273b88283aabbc6d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3183 21568 bytes
font_01_sfnt_off000060d7.bin
74a2e4b13885e9970d54042d80ce77434f5d604c926d2ceaaf84b221d58f1f08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D7 19072 bytes

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