Malicious PDF — malware analysis report

Static analysis result for SHA-256 67af0a6c3df200d1…

MALICIOUS

PDF

42.7 KB Created: 2021-05-14 03:31:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 94c37004a445998d59308fb0d3b99240 SHA-1: cd12214cc4d55bb0f24db8a91a6f83eaa6c966c9 SHA-256: 67af0a6c3df200d16785b0d9bf691320524bad6ca5d487fa6e42196a8a8ab50e
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-do-we-get-free-robux-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-do-we-get-free-robux-game-hack PDF link annotation
    • http://hindicenter.com/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/earn-roblox_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://hindicenter.com/images/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/moonactive-coin-master-free-spins_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
stream_003_off000047df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DF 27136 bytes
SHA-256: 95346d86f12ce1b4a51551535fbf396e5196c58b33db4d2636942988bc30d930
font_01_sfnt_off00008348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8348 18648 bytes
SHA-256: 357fc7c7eb6196ee12ed3080908575177554d85b467bf9142ee0ee232c3cf829

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