Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92a84419dd085c2…

MALICIOUS

PDF

49.5 KB Created: 2021-06-09 14:54:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e5162640433b2231f610a7c92bffc318 SHA-1: 8cb941dab2f7efd2ebd7ed5c9fcb894be7d57b4b SHA-256: a92a84419dd085c2747e8b5af5f69fb169ede3743db11785a2420ca20a4a2c51
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a fake CAPTCHA and a 'game hack' lure to trick users into clicking malicious links. The document contains multiple embedded URLs that redirect to known malicious infrastructure, likely serving as a gateway to further malicious content or exploits. The primary heuristic firings indicate a redirection lure and a fake CAPTCHA, suggesting a social engineering tactic to compromise users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.tw/app/431946152/www-robux-hack-com-game-hack In PDF document text
    • http://www.copoint.co.uk/images/descargar-roblox-hackeado-con-robux-infinitos-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/discord-free-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/robux-hacks-online-generator_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-robux-content-deleted_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/cookies-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005445.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5445 26516 bytes
SHA-256: 6ba9e5458b99a7e463c26749b10cc11571e067e06f3efd9e4237f62c1c55351b
font_01_sfnt_off00009089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9089 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D31 18868 bytes
SHA-256: cb4a0d999cfa22fee8a3eb4fa01f0d5fe82a464e8104b844766c37181203bef3

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