Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa77e5850161f24…

MALICIOUS

PDF

33.5 KB Created: 2021-07-09 08:50:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: da84ee1bef557c5dd336f544861a5483 SHA-1: 309b26ee6f3ffbefc1c5896dc3eaee6c87af1249 SHA-256: 2aa77e5850161f24c9dc68fa478abdc39a915aa3c6716ee44f1277e1e9b008a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and currency, identified as a lure for malicious activity. The heuristic firings confirm the presence of malicious redirector links and a general ML classification of maliciousness. While no scripts were explicitly extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

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/robux-free-online-game-hack In PDF document text
    • http://global-brand.net/userfiles/files/how-to-earn-free-robux-on-blox-land_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/build-battle-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/demon-roblox_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-thinknoodles-free-fall_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-roblox-cards-no-scam_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/counter-blox-roblox-offensive-hacks-wall-halks_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-hack-spins-free_GM406889139.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_off00002e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E52 21864 bytes
SHA-256: 1d5c1fa13eefb05ddfb6d4865f4f2dbc5c5397e8a8afab0c6b752b1f04817d62
font_01_sfnt_off00005e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E63 18912 bytes
SHA-256: ff36d619ce8e62cd296b26c96b34fbe88819c62effb096e20d6751b4628d3f13

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