Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2de81ecf7d1c5b3…

MALICIOUS

PDF

34.6 KB Created: 2021-06-17 16:20:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b6813bfedc2e95671e3dac650ddeea66 SHA-1: 36837b513424aa25babdf6456823e704285fe549 SHA-256: d2de81ecf7d1c5b36ba83427dbb650803864e47b3e9396b7253255479c46d129
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which are presented as lures for free in-game items or currency for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'ML_NYX_PDF_MALICIOUS' score is very high, suggesting malicious intent. The document body also contains a direct link to 'netcdn.co', which likely serves as a download host for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-blood-t-shirt-free-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/como-hackear-a-personas-en-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/final-stand-2-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-tiktok-editor_GM835599320.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/pokemon-go-free-quagsire_GM1094591345.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-no-survey_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_off00002ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECD 22792 bytes
SHA-256: d6eaf851adb069dbed02d76b2953a8b295c753480cad649c2445f51bae7e8a87
font_01_sfnt_off000061f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F6 19216 bytes
SHA-256: 0dd60509881483c70603c60a62029ff7a815902c04efbe2431dc15c320281488

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