Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbe6ad8bb04a367…

MALICIOUS

PDF

42.7 KB Created: 2021-05-18 03:03:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5b924e128ac96dce54fbdfcf9df25f19 SHA-1: 64eda356f2f5654d7a88e6413568c7bc42acccb5 SHA-256: 5bbe6ad8bb04a367794e29ec0d5a07ce5cc47c9b5638b0ccafe28f0d9f0f9ad3
182 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 a fake-CAPTCHA lure. 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 0.9971

Heuristics 6

  • 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.
  • 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
  • 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/406889139/coin-master-hack-no-human-verification-game-hack PDF link annotation
    • http://doganov.be/images/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://doganov.be/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://doganov.be/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://doganov.be/images/i-need-robux_GM431946152.pdfIn PDF document text
    • http://doganov.be/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://doganov.be/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://doganov.be/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://doganov.be/images/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://doganov.be/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://doganov.be/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://doganov.be/images/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://doganov.be/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://doganov.be/images/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://doganov.be/images/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://doganov.be/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://doganov.be/images/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://doganov.be/images/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://doganov.be/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://doganov.be/images/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://doganov.be/images/free-robux-games-that-actually-work-2021_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_off00004a59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A59 25184 bytes
SHA-256: 8e536801d105826ec0be11ca9f1f6a457cf1dd3d1a9a4b9dab0f245fc50d9a9b
font_01_sfnt_off000084e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E1 18248 bytes
SHA-256: b53d611e96a32094425b068729023046bb1db9f19d10500fe1599e8fd30759af

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