Malicious PDF — malware analysis report

Static analysis result for SHA-256 d548a69f6e7b61e6…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 16:25:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c56d699b9fb923dbbc767c8bda334e59 SHA-1: adb98188065ad73a8eb33e77fa163ce19a9b7eec SHA-256: d548a69f6e7b61e6f241597e771eb4326dcdf70800d1c99c30dc19600e192646
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, including a primary redirector URL associated with game hacks and cheats. The document body and heuristics indicate a lure for potentially malicious content, likely aiming to trick users into downloading malware or visiting phishing sites. The presence of many PDF links suggests a link farm or SEO manipulation tactic to distribute these lures.

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.tw/app/479516143/minecraft-noob-vs-pro-vs-hacker-vs-god-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-candy-van-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/game-stealing-service-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/create-free-audio-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-account-hack-system_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-300-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-no-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-catalog-stuff-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-promo-codes-2021-may_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/im-gonna-hack-roblox_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_off00003252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3252 21912 bytes
SHA-256: da7cf03b8e6e297d0cf72c9ac1f91938be427245d80f3bbe81e7c4fd250c1c37
font_01_sfnt_off0000628b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628B 18788 bytes
SHA-256: 73ec6ac80df223acd40be2e0a99cbfcc02b9dc3858d0872440f8b03ec1d9f2fc

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