Malicious PDF — malware analysis report

Static analysis result for SHA-256 776b251f7013f5d0…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 08:07:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f847bcba7be026f58e1399ff54039436 SHA-1: 8ccea0828ef53a1eafc9c21458ef2b8ed5e154cb SHA-256: 776b251f7013f5d040590c0df4472cb623cc086b2787cda8f60a176d8adcfa9e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous embedded URLs, many of which are presented as links to game hacks or cheats for popular titles like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to deceive users into downloading or visiting harmful content.

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.co/app/431946152/roblox-hack-btool-2021-game-hack PDF link annotation
    • http://library.yamasi.ac.id//repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/gas-station-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-speed-hack-in-dungeon-quest-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-earn-free-toy-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-app-ios_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coun-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/como-usar-el-hack-de-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-lost-hack_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_off00003003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3003 22420 bytes
SHA-256: 0a3ba4df0215f10830133e0fac9adf9795da237611e60325835f684fb5768194
font_01_sfnt_off0000622d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622D 19164 bytes
SHA-256: 3c6659e8e5544c70ad044b617b537ae8f560b1979ed00934e88a56c37e6d1f22

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