Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd8d6659bda45a2…

MALICIOUS

PDF

34.7 KB Created: 2021-06-30 09:31:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a33baefe2c67e0bc656c00a164cb85cc SHA-1: 369ca8bd44b3068085a9fe889b8b288b711493f7 SHA-256: 3fd8d6659bda45a2d5c2cd3cfbd693ccfda60684066b75353a6aaeaf28bbdd1f
220 Risk Score

Malware Insights

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

This PDF document employs a lure of game hacks and free items to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which then likely leads to further malicious content or downloads. The document body and heuristics indicate a pattern of SEO link farming designed to attract users searching for cheats and hacks, ultimately leading them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/seven-roblox-hack-download-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/kids-games-free-roblox-download_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-online-dater-clothes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/zombie-strike-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-city-free-game_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-play-roblox-on-xbox-360-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/como-conseguir-robux-gratis-sin-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pokemon-go-free-app-download_GM1094591345.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/www-roblox-robux_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_off00002f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F98 22660 bytes
SHA-256: d822ce038c355eb368b45e6ce954fde8d41a9b12f7f7f748d30a64a01113e5b7
font_01_sfnt_off000061ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AE 19276 bytes
SHA-256: 7f5ee65b7fd1f3c21e71aa61ed87a211a64b98ee20fa3ba5ae7b12110ca4fc8b

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