Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4910c5b4bf9858f…

MALICIOUS

PDF

43.3 KB Created: 2021-05-12 07:33:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 370406606fb4240b720d83d9a28cc543 SHA-1: 765f153e94046f0a85b05a0b4c6465e769aa783f SHA-256: d4910c5b4bf9858f714caaff7ef09d29460ed0cb3cb0d7c80d743d776b1eeb1f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack generator. The primary link redirects to malicious infrastructure known for hosting such lures. The document's content and heuristics strongly suggest it is part of a phishing campaign aiming to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/roblox-promo-codes-for-free-robux-game-hack In PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004794.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4794 27620 bytes
SHA-256: 493e77f7e62a40a87c6c9213d6b3b819d156031566200bd2c229fb39de97e301
font_01_sfnt_off000085ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85EF 18676 bytes
SHA-256: 3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f

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