Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e7363a3ccd689c…

MALICIOUS

PDF

38.8 KB Created: 2021-05-22 12:11:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bf2875598b3d8909adfeeb323b76a227 SHA-1: f01d635dc2aa6384b17860d6f8cdce56b54f0210 SHA-256: f8e7363a3ccd689c53ad9feab502c90f5625d42494d1ada36c3319a12661f113
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'Coin Master Daily Free Spins Link Today' and 'game hack' lures. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to further malicious content or malware downloads, indicating a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/406889139/coin-master-daily-free-spins-link-today-game-hack In PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://collectionsuncovered.com/media/storage/editor/files/how-to-download-minecraft-hacks_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
stream_002_off00003385.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3385 31128 bytes
SHA-256: bc6dbce201d0c15dc3426d87fd33d2ae97a32e38a1b13a7d44f2e210e605718a
font_01_sfnt_off00007552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7552 18652 bytes
SHA-256: b7acebacf47409c7f0f2932ba41e4c1dc120b4ef5280387cf9333091bd47b2e0

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