Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fac758d7ae3d9f…

MALICIOUS

PDF

50.2 KB Created: 2021-06-03 09:59:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0978e97a0d8b5cedb97805636c342e49 SHA-1: 856354b75e9f0c6f8ae9a5aa23597b64274168fc SHA-256: 05fac758d7ae3d9faa4f42e57d199fe28a9ce37fe284a347c8780725482bd535
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a 'free generator / game hack' lure. The document also instructs the user to disable security software and presents a fake CAPTCHA, indicating a clear intent to deceive the user into executing malicious actions. While no scripts were explicitly extracted, the PDF's structure and embedded links strongly suggest it's designed to lead the user to a malicious payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9734

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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
  • 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/get-me-robux-for-free-game-hack In PDF document text
    • http://empresa-venta.hr/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-company-robux-free_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FCB 27332 bytes
SHA-256: ef1064606fe10b4a73347cf8dc1c90e6d4edd07d67a5b7fbe1b572587e475bd2
font_01_sfnt_off00008d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D42 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000096e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E5 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off0000a0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F6 18312 bytes
SHA-256: 932e048767bb22e6267a54c454926b1d6572868c8ffb63cd4dd0c91a684054b1

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