Malicious PDF — malware analysis report

Static analysis result for SHA-256 d765a0a146582f2e…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 01:40:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2bab32a6fca722f4d9138a57b5d0b10d SHA-1: fba6485d26b690be1926141324ee69531bbbae06 SHA-256: d765a0a146582f2ef38aa69f5ce0df736db662b8d1cf46a8bc0aa9503a092b65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising free in-game currency for Roblox. The document body and heuristics indicate a lure for game hacks or generators. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-fun-com-free-robux-game-hack In PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-cheat-booga-booga_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/hack-de-roblox-para-atravesar-cosas-facil-hack_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-audio-hacker-in-the-server_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-free-robux-raffle_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/hacks-para-mad-city-roblox-rock-split_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-promo-codes-list-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/can-roblox-tell-if-you-are-hacking_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/butterfly-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-hack-how-to-see-peoples-inventory_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/comment-etre-hacker-sur-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-printable-roblox-thank-you-tags_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-animation-hack_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/legit-methods-of-getting-free-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/hack-all-guns-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-game-online-free-download_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/glitch-things-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-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_off00003300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3300 21448 bytes
SHA-256: a7f6302dcf1487aec0f531deaec6b78f643071ad7ef0a715066ca31a615eb5f8
font_01_sfnt_off00006231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6231 19052 bytes
SHA-256: 3b2abcc7aa29ca008ea5e4cc3b72e95e65b47650fe7c616c7ae72cc37841b392

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