Malicious PDF — malware analysis report

Static analysis result for SHA-256 512252689fb6bc1d…

MALICIOUS

PDF

35.5 KB Created: 2021-05-21 22:15:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4c5a128e367636b3f8f3d1dfaedde47a SHA-1: a973dd951991d2cabcf7c22a69d802cf4666f2c6 SHA-256: 512252689fb6bc1d26a274481064165b4b5c5b41144c713112e85ee2e56f7b14
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

The PDF document contains multiple lures related to game hacks and generators, specifically mentioning 'Robux' and 'Roblox'. It impersonates brands like Amazon, directing users to external URLs that do not match the impersonated brand. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-get-free-robux-2021-game-hack, which is likely used to deliver a second-stage payload or phish for credentials. No scripts were extracted, but the document structure and embedded URLs strongly indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-get-free-robux-2021-game-hack.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-get-free-robux-2021-game-hack PDF link annotation
    • http://vcelarskepotreby.org/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-links-for-free-coins-and-spins-for-coin-master_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_off000031f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F0 23720 bytes
SHA-256: ee9469757f3c58efe2e2faf3cd9826927ea86039e34e8c0aa36f5855e94c9469
font_01_sfnt_off00006808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6808 18684 bytes
SHA-256: 662354714a7c4aa127b8bd681013e9d5d113fbfc5a2f5afb2d34764175bb04a5

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