Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2f40ebd81973d3…

MALICIOUS

PDF

41.6 KB Created: 2021-05-12 13:50:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1afd2876d8d0913c2929d1dcaad12a06 SHA-1: 39d8e4bebe22fa1bbd434d5a71bf14bdafbd0ad6 SHA-256: 2d2f40ebd81973d3ec2bd72a84fce55ea2a710f42a51b7fa96e15978e30492da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as lures for free game items and hacks. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a malicious workflow involving redirection to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/free-roblox-printables-game-hack In PDF document text
    • http://sports-service.com/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://sports-service.com/images/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://sports-service.com/images/robux-come_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://sports-service.com/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://sports-service.com/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/robux-hack-generator_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
stream_003_off00004666.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4666 24828 bytes
SHA-256: 0ebe8c217d0f4b44e95cde56f7857d4e2d40b4497cb0ab3f716efe488e9bb328
font_01_sfnt_off00007f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F41 18552 bytes
SHA-256: 4229dcb1033c2214c22c2ce7fef2675aefed3814b9d932a68ba5770f56b27f64

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