Malicious PDF — malware analysis report

Static analysis result for SHA-256 18952c868c9a60d3…

MALICIOUS

PDF

46.1 KB Created: 2021-06-10 18:28:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b4ca37204a24515d341058791a69f543 SHA-1: aca5f15447f86d052014ea27308d60f818839831 SHA-256: 18952c868c9a60d342af8790c13f8b432d3e9edec41ba465ec2aac2c17d1cc13
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a 'link farm' heuristic, suggesting it's designed to redirect users to external sites. The document body, though partially corrupted, contains references to game hacks and free items, indicating a lure for potentially unwanted or malicious downloads. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/4-elements-tycoon-roblox-how-do-get-free-wrath-hammer-game-hack PDF link annotation
    • http://internetdeputy.com/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-video-files-for-roblox_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://internetdeputy.com/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://internetdeputy.com/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://internetdeputy.com/images/scripts-para-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://internetdeputy.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://internetdeputy.com/images/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://internetdeputy.com/images/free-robux-not-a-scam_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_off00005270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5270 26252 bytes
SHA-256: 397549db277d2516049ef76720909808b743eb3a79f3cea7b6f6722375ad5efc
font_01_sfnt_off00008e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1E 19480 bytes
SHA-256: 1588478049e9118b1a1f15f720910aafc5b3f744cad64b8d382bb20bedaec956

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