Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d4130bb3f941a0…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 09:36:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0e65063e6774ec4aff45c40494bbfaec SHA-1: 951320af8234952725d72720a24892f1713a3695 SHA-256: 86d4130bb3f941a077569456a847d5aa1eaa653df4f1b21f867b75de604811b6
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a visual download button lure, suggesting an attempt to trick the user into downloading malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a callback lure heuristic indicates a potential for further social engineering or scamming tactics.

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/406889139/coin-master-cheats-and-hacks-game-hack
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/sites-to-get-free-robux_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/freerobux-co_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/block-best-robux_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-coin-master-hack_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/roblox-getting-hacked_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/robux-free-online_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-free-android_GM479516143.pdf
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdf
    • https://digilib.stikesindramayu.ac.id/repository/real-robux_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/roblox-free-clothes-in-catalog_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdf
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/easy-robux-com_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-review_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051c2.bin
f0214b8a1d9bfc0b96945b667825bdb757879739cda78f5b444545aeb837597e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C2 24124 bytes
font_01_sfnt_off0000888a.bin
cb8371cc187c45116d0984119c2893dd3db0d7f7d568d007a419406e6ca9f389		 pdf-font-stream PDF embedded font (sfnt) at offset 0x888A 3380 bytes
font_02_sfnt_off00009477.bin
0d59d860eeb33d2bb1008893c3f0abb09d3487e08b21e621f2c355eaee4a2e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9477 19044 bytes

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