Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf722b76f4ff864…

MALICIOUS

PDF

34.0 KB Created: 2021-07-09 03:39:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0424df28063fc4ee37640a153221831d SHA-1: 57ed70f533469a5e92532f815206b2216e405cc6 SHA-256: daf722b76f4ff864fdbd82478bccb9c5341a289d794fbf743b386eab9728f296
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, such as http://netcdn.tw/app/479516143/minecraft-free-download-no-virus-game-hack, which are flagged as malicious. These links are presented as "free generator / game hack" lures, indicating a social engineering tactic to trick users into visiting potentially harmful sites. The document's content and embedded URLs strongly suggest an attempt to deliver a secondary payload or lead users to phishing pages.

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-free-download-no-virus-game-hack In PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://grosirhandukselimut.com/ckfinder/userfiles/files/appsmobinfo-coinmasterhack-coin-master-hack_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
font_00_sfnt_off000030f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F0 21684 bytes
SHA-256: 167898d7c71f9840a6c1073ce62500050c205249bc05b71fb5400c14608d9204
font_01_sfnt_off0000604e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604E 18852 bytes
SHA-256: cb8dfb970cdf0d1864248e93dc40b53e7b02b918a2ad4072c45ffd8478cc91fb

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