Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69643e89cf9f20c…

MALICIOUS

PDF

41.8 KB Created: 2021-05-15 06:22:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1e55c7eec9992baf46044adada5a3fd4 SHA-1: f26b8e0ad2eabcebf484e066fbb33550827bc494 SHA-256: c69643e89cf9f20cb24b16915032b7578460ba438ba645da0a79a0bc2bdaafca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body, though partially corrupted, contains URLs that further support this phishing pretext. The primary function appears to be directing users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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 https://netcdn.xyz/app/431946152/roblox-free-hair-boy-game-hack In PDF document text
    • https://mbbs.hr/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/fbchampion-com_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-gun-mod-download-free_GM479516143.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
stream_003_off00004632.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4632 25328 bytes
SHA-256: fc106c391820a4b3e86bff58d0107ba7f8333fa71d3ab02ed6ba11951ba60df9
font_01_sfnt_off0000804f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804F 18476 bytes
SHA-256: 3fabddb91e4eaecc087c17f99b1c80be23524e7eab6cbec0e1034232c0cbaaac

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