Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae2c46c2ed4f00a…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 12:17:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 638afaf30294b628215d94d40cd2ae4b SHA-1: e12aefedca297976f437e6602594cc34970270c0 SHA-256: 2ae2c46c2ed4f00a2ad35d1a3d3d15005a8c8e45a88cec1d4e331b1b8e28bc1b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector hosted on 'netcdn.tw' which is associated with game hack lures. The document body explicitly mentions 'Coin Master Hack Mod Apk Free Download' and includes the malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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-hack-mod-apk-free-download-game-hack In PDF document text
    • https://malungtreks.com/userfiles/files/como-hackear-cuentas-en-roblox-2021_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-no-verification-no-email_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/awards-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/hack-para-texting-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/robux-generator-no-survey_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
font_00_sfnt_off00003143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3143 22520 bytes
SHA-256: 3bb982bfee71c5566e29bcae46305f953a62300bd61c609758b5335bdc8da005
font_01_sfnt_off00006392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6392 18924 bytes
SHA-256: 6f4418fdf2b7e63a54348beb1bcc63faaf8dd422a5e9a8e1d4e79ebabab3b494

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