Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e592aaec9f54ac…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 14:20:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ce4f96f71cb0fb680d429cd2b058dc0b SHA-1: 34d31f309892ce8f4578febaa74d504dd7949217 SHA-256: 43e592aaec9f54aca907ff3b05883aa31be0a94594a0372fa38f4675515f8107
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that lure users into downloading game hacks. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the primary URL redirects to known malicious infrastructure, strongly suggesting the downloaded content is malware. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/robot.inc-roblox-hack-game-hack In PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-vip-server-roblox-anime-battlegrounds_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-fre-robux-on-a-computer_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-delete-admin-pads-without-hacking-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-hack-a-server-without-getting-kicked-out-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-guide_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-rtd-awakening-cheats_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-promocodes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/robux-hack-po-polsku_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-roblox-dominus-toy-code_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-mod-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-robux-by-inspekting_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000302d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302D 22404 bytes
SHA-256: 5093364caebbbdc14141dec4a2d6162c549916ecfcca83fd5680a519594d11ff
font_01_sfnt_off000061fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 18944 bytes
SHA-256: 7ffd9650ded373b2b570c24fa1692b2524c661e5fe712f6cfe629f7dbe2e0c24

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