Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b69ca72d9cfaa8…

MALICIOUS

PDF

42.5 KB Created: 2021-05-19 03:37:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 15faf9d3aadcc416c3b55efc6ed2eed1 SHA-1: 504f66abcf4f4766cc596d30964d6275f72ce7eb SHA-256: 30b69ca72d9cfaa8d8b6ab1f4a2d38b9275ae592054fd637fea08d29c86704cb
122 Risk Score

Malware Insights

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

This PDF document employs a lure related to free game accounts and currency, impersonating brands like Office 365 to trick users into clicking malicious links. The primary malicious URL identified is netcdn.xyz, which likely serves as a redirector to further malicious content or phishing pages. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or credential harvesting attempt.

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/479516143/free-minecraft-account-and-password-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/479516143/free-minecraft-account-and-password-2021-game-hack PDF link annotation
    • http://linde-erbach.de/images/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/pubg-uc-meaning_GM1330123889.pdfIn PDF document text
    • http://linde-erbach.de/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ad8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD8 24568 bytes
SHA-256: 1b53bbb09d399c8726f469c4f184dad9ea2e7b3ccc987248ed733e868c1498e0
font_01_sfnt_off00008236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8236 18744 bytes
SHA-256: 32e597d278032ff7c82e1179504235c91567bf80b74fa8ae34959daeb6a42353

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