Malicious PDF — malware analysis report

Static analysis result for SHA-256 366cbdf08053636b…

MALICIOUS

PDF

42.6 KB Created: 2021-05-19 04:04:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b8da649e991f60d945788a43a163eaad SHA-1: a2a6226a8e5dec364a745e87cd374f243873e00b SHA-256: 366cbdf08053636b088a04ed03fbdbe77271650501a8e11abde83b356eb72338
102 Risk Score

Malware Insights

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

The document contains multiple embedded URLs and a heuristic firing for 'PDF_URI' indicates an external URI pointing to a site offering 'robux hacks'. The presence of 'SE_PASSWORD_ARCHIVE_LURE' and 'SE_CALLBACK_LURE' heuristics suggests a social engineering tactic to trick users into downloading further malicious content or engaging with a scammer. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-hacks-2021-game-hack
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-not-used_GM431946152.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/coin-master-free-100-spin_GM406889139.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/coin-master-money-hack_GM406889139.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/robux-free-com_GM431946152.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/free-robux-place_GM431946152.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/free-robux-no-downloading-apps_GM431946152.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/free-robux-accounts_GM431946152.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/easy-free-spins-coin-master_GM406889139.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-today_GM406889139.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/code-free-robux_GM431946152.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/what-is-robux_GM431946152.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/blogspot-free-spins-coin-master_GM406889139.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-as-a-kid_GM431946152.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/20-free-spins-coin-master_GM406889139.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/how-to-use-wurst_GM479516143.pdf
    • https://elearningman1kotacirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-offers_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047cb.bin
150bc6e40dba9ebfb942180fe4b7542abd3eebee4ae04391da48291feee1e533		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CB 25620 bytes
font_01_sfnt_off000082d9.bin
03ab0df94635c5ebeb05191dd2fda9aa410ed650044dc459735f8f7cc99ee4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D9 18648 bytes

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