Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2dc7bb67c0a431…

MALICIOUS

PDF

48.8 KB Created: 2021-06-11 03:30:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 734871b9e54951927093a0d07f4a4aa7 SHA-1: fe98e12f745d7c65331d15f59fc821b57b7090b9 SHA-256: cb2dc7bb67c0a431f1c90f75e076c360d3f06eb8aa1eaa57932748f75f666ff8
102 Risk Score

Malware Insights

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

The document contains multiple embedded URLs and a primary external URI pointing to sites offering game cheats and in-game currency, strongly suggesting a lure for potentially unwanted or malicious downloads. The presence of a "download button" heuristic and the ML classifier's high confidence score further support this assessment. The document's content and heuristics indicate a phishing or scam attempt, likely designed to trick users into downloading malware or engaging in fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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
  • 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.tw/app/431946152/free-group-giver-roblox-game-hack PDF link annotation
    • https://mountainholidaytreks.com/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-hack-script-game-guardian_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-menu_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-bobux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-locked-accounts-with-obc-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/woman-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5386 26356 bytes
SHA-256: 6f7ebbc72801c99ce0536dfef967b07f9c2b133cb375e815768483f13f2ffd7e
font_01_sfnt_off00008eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB4 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5C 18496 bytes
SHA-256: 5b58d3081d4bcb51d54e06ea1855c61f98717536b8907039e1ff371132a787b8

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