Malicious PDF — malware analysis report

Static analysis result for SHA-256 898dc6eeb4a234df…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 06:12:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 84de45fa4a89f92d7a558b3e2b6d615c SHA-1: 0b4581451723cb1542450acbca3f33a0074e3c6e SHA-256: 898dc6eeb4a234df62bb28e8b775a8451d4f11976e6d085a1ac8ec8dd42f098b
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to sites offering free game-related items, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a visual download button heuristic further supports a malicious intent. While no scripts were explicitly extracted, the document's structure and embedded links suggest it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/old-roblox-accounts-for-free-game-hack
    • http://perpus.ar-rum.ac.id//repository/rbx-place-free-robux_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-links-2021_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/minecraft-112-hacked-client_GM479516143.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-robux_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/free-robux-accounts-2021_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-cheats-free-spins_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/roblox-printables-free_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-in-app-purchases_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/instagram-coin-master-free-spins_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/free-spins-coin-master-2021_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-links-for-free-spins-2021_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/minecraft-free-download-chromebook_GM479516143.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdf
    • http://perpus.ar-rum.ac.id//repository/free-coin-link-coin-master_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-no-verify_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-robux-in-2021_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-without-verify_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005099.bin
670709d38f0d3830ece7848416f78ab6e30c32d8b78ec95bfa2e9869f5e3fbd1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5099 24852 bytes
font_01_sfnt_off00008944.bin
f9ae40d06da1faec5351a3faa935316102e0fe42cf4920d902b4e62b452ba6a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8944 3112 bytes
font_02_sfnt_off00009400.bin
f0ce6b820c45e6e2988b5e2b6f1fd71f334d25f96e0178b7a1255a1417217111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9400 18368 bytes

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