Malicious PDF — malware analysis report

Static analysis result for SHA-256 74fbcfa77d6269c9…

MALICIOUS

PDF

33.0 KB Created: 2021-07-06 13:17:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 07d009c1e15df7b5221a6cc92b8ad74e SHA-1: 5afbfaea24900facce9e0dfc76aeb9de95656f32 SHA-256: 74fbcfa77d6269c9258f02df99a99506d4ddf64f013194da48b884a59bee5e21
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/479516143/free-minecraft-java-server-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/how-to-hack-with-dll-injector-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-accs-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-accounts-v3rmillion_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-bloxburg-house-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/2021-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-script-roblox-build-a-boat_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-roblox-accounts-passwords-online_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/friendly-face-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-activegamer_GM406889139.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_off00002f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F25 21700 bytes
SHA-256: bf5ceaeb396510c80bf73a7788d58704aa31a065db30c4b23f2516fb5416c740
font_01_sfnt_off00005eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB3 18136 bytes
SHA-256: 79ce7aa8dec46b2fdcf29b8d0048edf05813e69cc12e123608cbd366e975b5c1

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