Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f38694f642fb487…

MALICIOUS

PDF

49.3 KB Created: 2021-05-15 01:02:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 281e5e30d16af1b07b6de8ed0d806a06 SHA-1: cab5b0bcb7c52ce41593993a328b9d1ba4982371 SHA-256: 9f38694f642fb4878b5eece2ed9418de432372e69ecf14010e4875d2e49e6af4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are SEO-optimized and point to sites offering free Robux or game hacks, indicating a lure for potentially unwanted software or scams. The presence of a 'download button' heuristic further supports this. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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.xyz/app/431946152/free-robux-generator-no-survey-no-download-no-human-verification-game-hack
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/roblox-2021_GM431946152.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-robux-for-kids-no-verification_GM431946152.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-apk-download_GM406889139.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/minecraft-thumbnail-maker-free_GM479516143.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/get-free-spins-for-coin-master_GM406889139.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-game-hacking_GM406889139.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-link_GM406889139.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/minecraft-pe-apk-download_GM479516143.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-coin-spin-daily-link-coin-master_GM406889139.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-robux-no-verification-required_GM431946152.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/oprewards-login_GM431946152.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/free-roblox-adopt-me-pets_GM431946152.pdf
    • https://elearning.masnurulhidayahcibadak.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-35-13_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f9a.bin
58b690dc701f21f95579750b050b0cb29a4ede277aa63ef3ebdae7655f51bc4e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F9A 28020 bytes
font_01_sfnt_off00009054.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9054 2824 bytes
font_02_sfnt_off00009a03.bin
3cea6d4f9da734904bcc55369e0b79f4621aa36195ab65246c463812034b9480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A03 19736 bytes

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