Malicious PDF — malware analysis report

Static analysis result for SHA-256 78922a29e40cade9…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 19:54:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d61447746347ae42f84e20c7e458bdc3 SHA-1: fd37a8be8cf8c0774107fbb042643914d366bedb SHA-256: 78922a29e40cade98277c8c489f0255b8e0b312011a9223789190887f9dd0549
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to websites that promise free game hacks and currency, with a primary link identified as a malicious redirector. The document body and heuristics indicate a lure for users to click these links, likely leading to further malicious content or exploits. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or exploit delivery attempt.

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/406889139/free-coin-master-hack-no-verification-game-hack In PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/cheat-engine-fly-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-get-free-book-wings-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-animation-roblox-ninja_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-change-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/all-might-roblox-free-shop-t-schirts_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-cool-clothes-cheat_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/como-robar-cuentas-de-roblox-con-hacks_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-mad-games-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-dll-hack-952021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/ccv-roblox-hack_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_off00002f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F05 22896 bytes
SHA-256: 5db3b50b8dd956ae19b44f819fe2b9b64990d6acfb2e044b8476d104d5f04c59
font_01_sfnt_off0000624a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624A 18300 bytes
SHA-256: cb2b7cb0059af51db9ca07fd0e0130e31ebff2afe995e407a7cf27ef7bb28351

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