Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6fb3c49c7477e4…

MALICIOUS

PDF

47.2 KB Created: 2021-05-19 04:38:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5928f30ed1ac41edc6cf6bcbd3a943f8 SHA-1: 93e572a50e2b919bd97230ccc68a4f4860766b89 SHA-256: cb6fb3c49c7477e4956d280bc35e069364ea010afe326e97e2cb585dd751f965
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a heuristic firing for an MFA lure, suggesting an attempt to phish for credentials or session tokens. The document body, though heavily obfuscated, contains references to game hacks and downloads, indicating a lure to trick users into downloading malicious content. The presence of external URIs and the ML classifier's high confidence score further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/robux-game-hack
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/roblox-royale-high-diamond-hack_GM431946152.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-robux-not-a-scam_GM431946152.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack-download_GM431946152.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/roblox-cheat_GM431946152.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/coin-master-in-app-purchase-hack_GM406889139.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/whats-robux_GM431946152.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-march_GM406889139.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/roblox-comcom_GM431946152.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/minecraft-win-10-free_GM479516143.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/coin-master-game-free-play-online_GM406889139.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/spin-link_GM406889139.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/www-roblox-robux_GM431946152.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-2021_GM406889139.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/free-robux-meme_GM431946152.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/minecraft-for-free-games_GM479516143.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/get-me-robux-for-free_GM431946152.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/get-free-robux-gg_GM431946152.pdf
    • https://elearning.min1kotamalang.sch.id/__statics/gudangsoal/files/hack-coin-master-apk-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b78.bin
31adecfc6b25fcc37038540d163534c27d86ec3d0062e7ca4e805fa3469569c8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B78 29716 bytes
font_01_sfnt_off00008d9d.bin
972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9D 2820 bytes
font_02_sfnt_off0000973c.bin
ccf20ca1ad80d0cd2f0d464461636129858ae353cf2c3769b35ef20048afdef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x973C 17852 bytes

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