Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f42c889018697f…

MALICIOUS

PDF

34.2 KB Created: 2021-06-22 01:43:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d17ac4d49de0001ece2629ed9337a510 SHA-1: bce1da9907e78db078c928f92d5cb75f9acbb93b SHA-256: b3f42c889018697f93797c1a2421a19c7f546326eb7a12a6e507f2e1b400386e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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 http://netcdn.co/app/431946152/get-free-hair-roblox-game-hack PDF link annotation
    • https://vierabyragazze.com/upload/files/roblox-base-raiders-hack-infinite-basebux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-free-name-change_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-hack-in-roblox-treasure-hunt-simulator_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-hack-peoples-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-just-enter-username-no-verification_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-apk-114_GM479516143.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_off00002ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE7 22484 bytes
SHA-256: dacb93ca8eba70b883783d9dca9af405deb3182e79e4b5870e44fb40d32dc7ee
font_01_sfnt_off00006105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6105 18876 bytes
SHA-256: dd03afef454b9e51c0e9638edac6660b92612f50f13c1febf3964f1b0f9bcf24

Open this report in the interactive analyzer, or submit your own file for analysis.