Malicious PDF — malware analysis report

Static analysis result for SHA-256 497f3a7232f2314e…

MALICIOUS

PDF

33.8 KB Created: 2021-06-19 11:36:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2099bc8ef535aef498a16fad49f1d4bf SHA-1: 6cf3978969f5df56f86e6a79fbe43ff307b207d5 SHA-256: 497f3a7232f2314e4e4099d8c1e76f6df503261b42f14de08096b0891d1510eb
168 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and links to known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/free-characters-on-roblox-game-hack. The document body and heuristics indicate a lure for free in-game currency or items, designed to entice users to click the malicious link. The embedded JavaScript likely facilitates the redirection or further exploitation, contributing to the overall malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/free-characters-on-roblox-game-hack In PDF document text
    • https://sundae.co.th/js/userfiles/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-hack-working_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-roblox-redeem-cards-nov-2021_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/claim-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-hacks-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/pubg-uc-earning-app-2021_GM1330123889.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/wings-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-hack-coin-master-apple_GM406889139.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
font_00_sfnt_off00002e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E69 22140 bytes
SHA-256: dcad56200d9de406127e3486dca1082c45a0be9fcfa50b5f7a0a107c05e817dd
font_01_sfnt_off00005f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F88 18920 bytes
SHA-256: 1fe331c42ee3101d13843943d95b933acfe467964d3a809b0b5295adc5360196

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