Malicious PDF — malware analysis report

Static analysis result for SHA-256 582b0d21e2f95cab…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 03:45:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a26d06b7a874366fa69f576ef6183d7e SHA-1: ecf4bd10271f087c3e60d964cdce9f2a27495406 SHA-256: 582b0d21e2f95cabc3a74385b45e4b99a8a761099e3fd698518b3d301956ee91
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes 'free gift cards' and 'game hacks' for popular games, indicating a phishing or scam lure. The heuristic firings, particularly PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, strongly suggest malicious intent. The document likely aims to redirect users to external sites that may host malware or engage in further social engineering.

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.tw/app/431946152/free-gift-cards-2021-roblox-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-pubg-uc-be-hacked_GM1330123889.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-a-free-dominus-hat-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/snip-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-more-robux-for-free_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_off0000300d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300D 22744 bytes
SHA-256: f147d6de652761f93c3cb614095e86037b7ee03114f92e60dd96154609ab33f5
font_01_sfnt_off0000630c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630C 19264 bytes
SHA-256: 7184a1b74e145627ecbaaa24b62a0e3dd72d3f3bf646062f461768a9ad14e677

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