Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a8037238053a97…

MALICIOUS

PDF

35.7 KB Created: 2021-06-29 04:44:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8ee8026a993f12122924631032f77900 SHA-1: 9fc824c2a5a13b9be912dd77355da55dcfaf31ee SHA-256: 49a8037238053a975beed354bea36a3ae892ce08d7caca432ef7384e7563a607
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a lure for free Robux, a virtual currency, and contains an external URI pointing to a download site. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a call-to-action button suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious intent to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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 http://netcdn.co/app/431946152/free-robux-2021-real-no-human-verification-game-hack
    • https://lib.unitri.ac.id/repository/roblox-ez-hacker_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/will-minecraft-dungeons-be-free_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/free-roblox-gift-card-codes-2021-november_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/ninja-legends-roblox-hack_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/free-robux-hack-2021_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/roblox-mad-city-cheat-to-kick-people_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/easy-free-spins-coin-master_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/free-stacked-roblox-accounts_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/get-newer-phone-for-free-robux_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/krnl-roblox_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/roblox-comroblox_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/how-to-hack-coin-master-spin_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/roblox-catalog-free_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/prison-life-roblox-hacks_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/to-get-free-robux_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030d1.bin
f213127292a27c7f015817bb6e1561d8125c799039a0ad60dc68aa1d748e6ddc
pdf-font-stream PDF embedded font (sfnt) at offset 0x30D1 22944 bytes
font_01_sfnt_off0000647a.bin
193d95473eac8c6c561546feb0fc987e00b57065ead167998a889558cb02a01d
pdf-font-stream PDF embedded font (sfnt) at offset 0x647A 19812 bytes