Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2e418b5ca45f38…

MALICIOUS

PDF

34.4 KB Created: 2021-06-27 23:14:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8c280e1d3bf4f9303d20589fca4e4853 SHA-1: 6b05fa1922677bef75a944f8ccbb5433984f268a SHA-256: 8b2e418b5ca45f386fdbe9b4ef028ca63e266c0fe2866c15ff4ec84fd4b3e6b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a critical heuristic identifying a malicious redirector. The document body explicitly mentions 'free generator / game hack' and links to a URL promising 'free faces on Roblox'. This indicates a social engineering lure to trick users into visiting 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.co/app/431946152/how-to-get-free-faces-on-roblox-phone-game-hack In PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-shred-money-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-free-rade_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-powering-imagination-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/hack-para-roblox-mathdrive-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/booga-booga-in-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/hacks-for-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-no-human-verification-no-survey-no-offers_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-com-free-dominus_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-hack-downald-lvl-dragon-ball-final-stand-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-artmoney-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-free-full-download_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/project-alpha-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/harked-roblox-script-free_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-hack-tycoon-money-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-free-followers-bot-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-catalog-in-roblox-2021_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_off0000304f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304F 21928 bytes
SHA-256: 03a32a6bdaa8d64dc3cd65306cb3b661608cc9e908dcf39977c7e3b76f79953e
font_01_sfnt_off000060b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 19240 bytes
SHA-256: 534aff83fdb7bcbf042ffdd0ab900e4a11b96817c3b21287553d94c5d3d1290c