Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2b6e17f8d9e5d2…

MALICIOUS

PDF

32.4 KB Created: 2021-07-04 01:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 50ce26a0e869332d337392346095b674 SHA-1: 646e8ea962a598dfcde77da1439141d4265a04ce SHA-256: 3c2b6e17f8d9e5d2a949b1e70e73773b85a9450dd4fcd8d8537258627ee2241b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and generators for popular games. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document's content and embedded URLs strongly suggest a phishing or scam attempt.

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/479516143/minecraft-wurst-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-cheats-phone_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/real-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-that-has-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-roblox-hair-codes_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_off00002c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C06 21852 bytes
SHA-256: ac362372ed227e154b39d9d784f1788946d318c4c77b1f4d096d243c8893b2bc
font_01_sfnt_off00005c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C16 18196 bytes
SHA-256: a23478f9f56669a76cf56b8835be903c3d1a782a7d8b6a30124e2d5a3e2311d7

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