Malicious PDF — malware analysis report

Static analysis result for SHA-256 471dc780455ae44d…

MALICIOUS

PDF

42.0 KB Created: 2021-05-15 04:04:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c2bd0fbe7090d1f35402d44a7c6759eb SHA-1: 9102ff59acbd8a192f99a72a23f3299b0a22a962 SHA-256: 471dc780455ae44d22709de46ecfacdd11d4c3b84e26f5635bf1a8776511e01b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are presented as cheats or hacks for popular games like Coin Master and Roblox. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic suggests an attempt to distribute or redirect users to malicious content. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-hack-extension-game-hack PDF link annotation
    • http://truebibleteaching.com/images/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://truebibleteaching.com/images/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://truebibleteaching.com/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://truebibleteaching.com/images/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://truebibleteaching.com/images/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://truebibleteaching.com/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://truebibleteaching.com/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://truebibleteaching.com/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://truebibleteaching.com/images/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://truebibleteaching.com/images/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://truebibleteaching.com/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://truebibleteaching.com/images/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://truebibleteaching.com/images/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://truebibleteaching.com/images/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://truebibleteaching.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://truebibleteaching.com/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://truebibleteaching.com/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://truebibleteaching.com/images/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://truebibleteaching.com/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://truebibleteaching.com/images/coin-master-get-free-cards_GM406889139.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
stream_003_off0000494c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494C 24956 bytes
SHA-256: c1157b7d8527db221125f69525161f54149bf5d135155b246d13a4b22eddcfa5
font_01_sfnt_off000082f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F8 17924 bytes
SHA-256: 4ec806a11ea658252867691d695683eda87cb09c7a2cbc5226fdb095b6c4840a

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