Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac9cb57304ec2ed…

MALICIOUS

PDF

42.1 KB Created: 2021-05-10 20:05:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b6e06497998e03f3fe391ce117ee5e84 SHA-1: a577bb9818598db0812849283074daacc0684d58 SHA-256: 4ac9cb57304ec2ed7b579a25904cd25b807bee0ef45e288117167ddff0ea4616
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains lures related to 'free game hacks' and 'remote support tools', directing users to malicious URLs. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or facilitate further compromise. No scripts were extracted, but the document structure and embedded links suggest it's designed to exploit user interest in free game items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/479516143/how-to-get-minecraft-for-free-2021-game-hack PDF link annotation
    • http://pisanie-nut.pl/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://pisanie-nut.pl/images/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://pisanie-nut.pl/images/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-link-spin_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_off00004a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A13 24856 bytes
SHA-256: 7d530e6e6ad6dc6ece11141488a50b7c716393432479f5c9b5d524f2abe3ad2a
font_01_sfnt_off00008254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8254 18276 bytes
SHA-256: f72584a9d01c2da042f33208491f9b72ec8022d2d16609869bbd7195f9399835

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