Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca0662f8c4ce23f…

MALICIOUS

PDF

35.8 KB Created: 2021-05-20 16:27:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b85d5eee4b4401aac9d9c799159bd3eb SHA-1: 76f34e1f7cdd5a03dcfcfb639d4c7ab5ee484ef7 SHA-256: fca0662f8c4ce23f437b67c5b80688b338f6407a975006a7d77041d84cdfc174
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising a 'Coin Master Free Spin' generator. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-free-spin-today-game-hack, which is associated with redirector infrastructure. The document body and embedded links suggest a phishing attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-free-spin-today-game-hack In PDF document text
    • http://gomelavto.by/images/tiktok-free-10-likes_GM835599320.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/free-spin-link_GM406889139.pdfIn PDF document text
    • http://gomelavto.by/images/80-free-spins-coin-master_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
stream_002_off0000319a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x319A 25640 bytes
SHA-256: 7f36374e6d1ee00baeff8d958b866532722b406ca0d749cb734b7a8302b27e20
font_01_sfnt_off00006ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB4 18240 bytes
SHA-256: a96ac7afd25cadbabafd1b9dbf0a180d0c1833ed2d07acb4363f122556c39d20

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