Malicious PDF — malware analysis report

Static analysis result for SHA-256 74693726c9afe447…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 23:09:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 988fdb4431b6ddc55b88ee8d02cd6c1d SHA-1: 825b308da458934c8aa30693282bbc9f4cdfea09 SHA-256: 74693726c9afe447d3572f67c11002657ea39a2e8bf1129371a2a850f3b8e130
142 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are SEO-optimized for terms related to free in-game currency and cheats. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to execute a command, a common tactic for social engineering attacks. The ML classifier also flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-logo-maker-free-game-hack
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/easy-way-to-get-robux_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/bux-free-robux_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-rewards-free-spins_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-can-you-get-minecraft-for-free_GM479516143.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-ultra-attack-hack_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-apk_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/roblox-free-hair-codes_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/robux-hacks-2021_GM431946152.pdf
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdf
    • http://perpustakaan.ipts.ac.id/repository/minecraft-pe-hacks-2021_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054ab.bin
ff223c2c243522c33a3741662aba0896e10bee57c6f5f34e92adb48efb5353f7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54AB 24904 bytes
font_01_sfnt_off00008d4f.bin
297237ce210fb0ad9e803fe1f66d3dc70a27f861bbe6cba603c2ca3e8103b74b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4F 18168 bytes

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