Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a912c87985f43b…

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 06:58:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f458199b45a7e353c3fa882ac63649ee SHA-1: 0153e07ce958f8cb4dcb9292a3597f689fb18af5 SHA-256: 76a912c87985f43bcba5cfc5ea85571b1b849f3b4746219a4ff0435f4a7dbf3f
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are presented as download opportunities for game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-linked PDFs suggests a link farm designed to distribute malware or lead users to malicious sites. The document body itself contains a primary URL that appears to be a download link for a game hack.

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-2021-jailbreak-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/roblox-dragon-ball-z-final-stand-cheat_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-blood-moon-tycoon-auto-rebirth-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-using-chrome_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/op-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-vip-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-phantom-forces-hack-no-virus_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_off00002dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD9 22120 bytes
SHA-256: dde819e800acf5a7e47ec9b6b784d3e227f6d45b40a9a30a38d879b2eb137805
font_01_sfnt_off00005f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F14 19344 bytes
SHA-256: 4f9249e6491abb5e4c87abb1b3ce46f25c298653549c7c5878e9f44828c01477

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