Malicious PDF — malware analysis report

Static analysis result for SHA-256 617254514080bb62…

MALICIOUS

PDF

34.2 KB Created: 2021-06-28 05:01:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0284e23b183393a3c56ea215b1245dd7 SHA-1: 98036797e1d1b2f4a65d4e763c89381a38c5d984 SHA-256: 617254514080bb62cd007a1f0dee4dc368003a9e35d3cb25c1c4822eaed98983
142 Risk Score

Malware Insights

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

This PDF document employs a link farm technique, presenting numerous links to websites that promise game hacks and currency. The primary lure, 'Mega Roblox Hack Engine', directs users to a suspicious URL, likely a gateway to malicious content or downloads. The ML classifier strongly indicated maliciousness, and the presence of multiple SEO-optimized PDF links suggests a coordinated effort to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/mega-roblox-hack-engine-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/tiktok-free-view-iphone-join_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-not-fake-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-no-wait-works-proof_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-of-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/food-empire-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-arcane-adventures-v4-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_off00002e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E77 22492 bytes
SHA-256: 6ccd70a60d9cf12b7b8655994be796955c2059a118442c3672318ad9345cc142
font_01_sfnt_off000060d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D3 18972 bytes
SHA-256: 0b55d9fbb2fef6ef94e99db55c1ef54ad91692e530991953e0646f95f53f697f

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