Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a90147c2329daf…

MALICIOUS

PDF

35.6 KB Created: 2021-07-03 13:03:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9afc2cf56c1127cd95cf1bfe925b2002 SHA-1: 812031665577b03f25d3f45dd6d57cc1a1806b89 SHA-256: c1a90147c2329daf096c81b7a6bdae56a22c4cc8a0bce64ff0f62797b113b88e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to entice users. It contains multiple embedded URLs, including a primary redirector at http://netcdn.tw/app/406889139/coin-master-free-cards-link-2021-game-hack, which is flagged as malicious. The document's structure and embedded links suggest it is designed to lead users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/406889139/coin-master-free-cards-link-2021-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-2021-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/can-your-roblox-account-get-hacked-by-cookies_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-cheat-enginge_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-code-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-fortnite-simulator-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-robux-hack-no-offers_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hack-roblox-online-com_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-on-roblox-on-computer_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hack-tower-battles-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-robux-hack-online-genorator-tool_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-grand-blox-auto-money-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-spins-and-coins-daily-links_GM406889139.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_002_off00003223.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3223 23464 bytes
SHA-256: 65e9a4720ac3442c290f894f1c4f75a78466769dd7010691ec7c352ea799934d
font_01_sfnt_off00006721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6721 18744 bytes
SHA-256: 30a2c575023908b4f2873a2c506cf1dd7d4cce6c2b03b20b5a33b18f82d0ec48

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