Malicious PDF — malware analysis report

Static analysis result for SHA-256 200cd6bc165b47e7…

MALICIOUS

PDF

45.3 KB Created: 2021-05-22 11:10:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cf0ad859f7f307ac22d41343a106c125 SHA-1: fd043524e052ff4c436f1d502bdcb25fb2ffa30f SHA-256: 200cd6bc165b47e7cd1320c408600f5a315055fa1d738db713bd9af893d6dfe9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, including one identified as malicious infrastructure. The document body explicitly mentions 'Coin Master Free Spins Link Today' and a 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', indicating a social engineering lure for game-related cheats. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7947

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-spins-link-today-instagram-game-hack In PDF document text
    • http://olimpik.mk/imagescke/upload/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/can-you-download-minecraft-for-free_GM479516143.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_off000035e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35E3 24808 bytes
SHA-256: e64eb51920ec3939d6f63702de686989fdaf0dd163a6577b80eb793f3ca938dc
font_01_sfnt_off00006f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2F 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7914 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off00008d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9F 18960 bytes
SHA-256: c3cae131f36bdfe9c813bd150295f39ca0ceeabf3546a2df254cc03f93d9c6e3

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