Malicious PDF — malware analysis report

Static analysis result for SHA-256 5835decb30fe9299…

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 04:29:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 51d0bf5b34a8b721024c8da0e56f7ead SHA-1: aad45c9929fba642895ce92e7afb138c4e254816 SHA-256: 5835decb30fe929932b2f728d970f45a9513c611a03b9023a6bc790308d258f2
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence lure for brand-impersonation credential phishing, specifically impersonating UPS and directing users to a "game hack" website. The embedded link, https://netcdn.online/app/431946152/robux-no-survey-game-hack, is the primary indicator of this malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest a malicious workflow designed to trick users into clicking the link, likely leading to credential theft or further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/robux-no-survey-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.online/app/431946152/robux-no-survey-game-hack PDF link annotation
    • https://iear.com.tw/image/data/files/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/claim-roblox_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/free-coin-app_GM406889139.pdfIn PDF document text
    • https://iear.com.tw/image/data/files/coin-master-hack-mobile_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e35.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E35 26376 bytes
SHA-256: dff8710712a5aed79f91a87716e359f8862de48870f3c8b3211c3a86a8cd5af8
font_01_sfnt_off00008ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE3 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off00009c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C54 18144 bytes
SHA-256: 51c7a9de4a3a273f6fa8ac7622f19aef511f410b3317fdbb853ddd1ab61a3972

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