Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8070bc45aaff8bf…

MALICIOUS

PDF

45.5 KB Created: 2021-05-16 12:36:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b856d8a3c200c30d39ab4f0f082e3764 SHA-1: c3a25b93d633c884a1c5e44418600e18b0f3ac12 SHA-256: f8070bc45aaff8bfdcfa66c25436c8cf5d25e2fbe0ef4a1471ba3bf8b04bd12a
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to game hacks and cheats, suggesting a lure to download potentially unwanted software. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting this malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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 https://netcdn.xyz/app/479516143/minecraft-wurst-hacked-client-game-hack
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-robux-videos_GM431946152.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-robux-codes-no-human-verification_GM431946152.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-hack-pc-free_GM406889139.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-mod-download_GM406889139.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-latest-mod-apk-free-download_GM406889139.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-roblox-pin-codes_GM431946152.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-spin-link-in-coin-master-game_GM406889139.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-robux-no-verify-2021_GM431946152.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link-facebook_GM406889139.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/buy-robux-free_GM431946152.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/robux-earner_GM431946152.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/how-do-you-hack-roblox_GM431946152.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-today_GM406889139.pdf
    • https://elearning.masirsyad.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-2021-espaol_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f6f.bin
c4e56f1e2c3b768892fa46377629787d7fc6504df54df75951553b8ef570e677		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F6F 28904 bytes
font_01_sfnt_off00008fca.bin
7137e4e2e9658b649895b635d5af54e9ac78bb5b6b308aaf2a8e981e2e5df966		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCA 18324 bytes

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