Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d84a6a6c5b41f6…

MALICIOUS

PDF

41.7 KB Created: 2021-05-21 11:32:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 08c72a145634901245bdc8a1e0518966 SHA-1: aa579fe1c4fa78798e9348e2d036c13bdea8c37b SHA-256: 63d84a6a6c5b41f63627b55806c341f8779decbf6386cffc7ac67658f04f5c9b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as 'free generators' or 'game hacks'. The document body and embedded links suggest a lure for users seeking in-game currency or similar digital goods. The primary goal appears to be directing users to malicious infrastructure that likely serves further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8078

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 https://netcdn.xyz/app/835599320/how-to-get-free-coins-on-tiktok-game-hack In PDF document text
    • http://dana1157.com/images/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003244.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3244 25168 bytes
SHA-256: 8851ffb0c4bed9dfb999ac0a7ca0503822f278c60aa4aa2720ea7cbbc0027791
font_01_sfnt_off00006cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD0 3372 bytes
SHA-256: dfbbf67cbc7ecc66ac4d03805ccfff7e5c1407898ea3c5e2b9241b85217ff1cd
font_02_sfnt_off00007852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7852 3120 bytes
SHA-256: 49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca
font_03_sfnt_off00008366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8366 17620 bytes
SHA-256: a70420454de2d0aac39539e39c590a982a6360a54609316ad93aa98ab536d9bf

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