Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3472b50ab9e8137…

MALICIOUS

PDF

42.0 KB Created: 2021-05-12 14:07:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1b483e502ea44c0bb12baf81101af904 SHA-1: 45d797afc4fdfde829de1d4f7811a6f9cba1fc15 SHA-256: a3472b50ab9e813731411cc0773af450791e37f65b0c888dd446d8388ddd4586
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and a fake CAPTCHA to trick users into clicking malicious links, impersonating Microsoft in the process. The primary malicious URL identified is https://netcdn.xyz/app/431946152/generator-robux-game-hack, which is likely used to deliver a second-stage payload or conduct credential phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/generator-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/generator-robux-game-hack PDF link annotation
    • http://subarulegacy.com/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://subarulegacy.com/images/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://subarulegacy.com/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/robux-match_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/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
stream_003_off000047a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A4 25108 bytes
SHA-256: e40abc5369865455da1074244b2c455c435b9de19317dd4a3b1e3bb7fd6ff15c
font_01_sfnt_off000081c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C1 18184 bytes
SHA-256: b4ce75e5ef7529b15199eebab458c6aae3f76f2df33fea1dae4b183417bcc22e

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