Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d99e0ec8ea3544f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-20 06:30:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fe3ab682110d7f21e3c94ba37a587c5e SHA-1: 3482c7ae30a8b8d31c06b08dc6a509bf8679854c SHA-256: 7d99e0ec8ea3544fb3b59710231ff05bf6e2c23ce87c857cfaba0198a3cb18f0
160 Risk Score

Malware Insights

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

The PDF contains lures for game hacks and free currency, directing users to a known malicious redirector URL. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a high likelihood of exploiting PDF vulnerabilities or redirecting to malicious JavaScript content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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-spin-and-coins-links-2021-game-hack In PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-minecraft-premium-account_GM479516143.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_off0000320d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320D 23408 bytes
SHA-256: b36f71540acd206e67f9f23e35e0ba941eba45becffd5810553b6e7163f3428f
font_01_sfnt_off000066de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DE 18632 bytes
SHA-256: bf450557b00699bdc36230f8bff75cef2d4ddc3329c11821453b6bd8c7be45f9

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