Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f5504dcacf3ca9…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 18:03:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4e83ec475af7b2de03b3561dd66ece77 SHA-1: d08d86c4dcb85375d7c0400c90bf62ecf5bccdad SHA-256: a6f5504dcacf3ca9c01225bf4aecfcb4c5d052a078dbb6691c6ee14239527e1c
82 Risk Score

Malware Insights

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

The document body and extracted URLs indicate a lure for game cheats and hacks, specifically mentioning Roblox and Coin Master. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be instructing the user to provide a password for a downloaded archive, a common tactic to bypass security filters. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/roblox-password-hacker-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk/repository/denis-free-robux-code_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-fe-music-gui-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-group-finder_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/new-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/nuevos-hacks-de-roblox-2021-benimo_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-jailbreak-how-to-get-money-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/is-pokemon-go-free-on-iphone_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/lv-7-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-plaza-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/do-you-get-banned-for-trying-to-getting-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hack-para-phantom-forces-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-do-we-get-free-robux_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
font_00_sfnt_off0000313b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313B 22040 bytes
SHA-256: 4de3322d8cc4b520e2762bd974b025dd5deddbe4923a402031bce64d767ed458
font_01_sfnt_off00006204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6204 19148 bytes
SHA-256: 587bb67a6fac503eedf6da7598b6243307b881b124322d9f2e1b957722bcd290

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