Malicious PDF — malware analysis report

Static analysis result for SHA-256 d291731deb1a1d1a…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 21:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 64ab2b9053689ab4b0cc3e82f187deaf SHA-1: d08a3759bf57d08f053b4dd5d489dc456f99752d SHA-256: d291731deb1a1d1a04283fb22fc0f5270e39b6ca1e15d5e62dc041cfbcf2c541
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors and other PDF files, all related to game hacks and free in-game currency. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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.co/app/431946152/is-it-true-you-can-get-free-robux-game-hack In PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-get-free-audio-uin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-escape-prison-hack_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/paginas-roblox-free-robuxx_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/114-hacks_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-roblox-clothes-boy_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_off00002fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB3 22668 bytes
SHA-256: db9aca546c03cc07d75602a46ed9c5779bbf22bad223e20dd05cc6683e51f040
font_01_sfnt_off00006276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6276 18984 bytes
SHA-256: 684f529002b0271408cd6fc6ed4de1be3c26e1071eed1d8c69494865cb100fae

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