Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a715df4213ba15…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 00:28:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2ae9a5d4930e4f6e9ddbf4bbb95dc6b7 SHA-1: ae3475fc6f20a99e3ac687f226ed1ce31a4b8561 SHA-256: e5a715df4213ba157f40d173714401dbeae964cef2d8c95c9f73f779a29b5894
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of SEO-optimized links, many of which are related to game cheats and hacks, suggesting a lure for users to download potentially malicious content. The presence of a 'password-protected archive handoff' heuristic indicates a common tactic to bypass security scanning. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/free-robux-accounts-2021-game-hack PDF link annotation
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-roblox-safe_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-any-account-password-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-extension-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/is-tiktok-free-on-iphone_GM835599320.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-2021-code_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robux-hack-easy-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-how-to-get-in-bloxburg-for-free-2021_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_off00003029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3029 23244 bytes
SHA-256: 3015e1bc984e4d9b3dee74e2f4778634fe194eccd5838ea6815bc0ce1096003b
font_01_sfnt_off000064a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A6 19224 bytes
SHA-256: 156e97e656f4bb783494abd7ae53ecfa8912a458841a7d4a142d29130362a46d

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