Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84c18ea667333bb…

MALICIOUS

PDF

41.6 KB Created: 2021-05-11 23:08:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f15177ae476068b93d7bc38eaa4bb8cf SHA-1: 2b35ab0fb075cebf99eda10b1943863441dc6664 SHA-256: b84c18ea667333bbfe85e59dffebfbc649ecd55288c923f044787784a63a26d7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/479516143/mcpe-1.16-game-hack PDF link annotation
    • http://sagrasantacroce.it/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://sagrasantacroce.it/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/corn-master_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-free-spin_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_off00004ac4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC4 24948 bytes
SHA-256: 29191ed513e10edc2ca9c08f30ae10a9ec4b80aeb3d705868d8853b4ac7eea61
font_01_sfnt_off0000824c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824C 17632 bytes
SHA-256: 4711a1543ea496a0f3d81235f335b2b9fd92f871e961f966e2047284bc2cd8dc

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