Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3b27fce088a56b…

MALICIOUS

PDF

54.3 KB Created: 2021-06-04 02:29:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7d9ff1c383d7d2ff2c8fb057f5069af0 SHA-1: aa99b5308896da1069aae9c7bba2d6538a2d874c SHA-256: 2a3b27fce088a56b1c15f5742955bc4d7418b682cb0601a69e1ac88af2d71c3b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links to external websites, many of which appear to be part of a link farm designed to attract traffic. The primary URL, 'https://netcdn.online/app/431946152/can-i-get-free-robux-game-hack', suggests a lure for free in-game currency, a common tactic for phishing or scam operations. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9636

Heuristics 4

  • 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.
  • 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/can-i-get-free-robux-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-robux-games-that-work_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/where-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-spins-free-2021_GM406889139.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_off000053e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53E9 37984 bytes
SHA-256: 13e368cbf620a0cbea589f4432d7e26b22adadbabe998be34f5243e1a7000315
font_01_sfnt_off0000a7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7CC 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_02_sfnt_off0000b1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1DD 18344 bytes
SHA-256: a3821bea5d8002917ca36036ff520c3c0be187df4be91a81bd8356ddd2b369c9

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