Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c6cd6f226e75c8…

MALICIOUS

PDF

39.3 KB Created: 2021-05-22 05:33:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 62de2c51126a03b7fff7b462ed59799a SHA-1: 59836b4d4463679a9645d727886ce9d300a5c494 SHA-256: 80c6cd6f226e75c84fe18373ef63c81924dd471f92561d4dc71eee91cd8f94f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising "free spins" and "game hacks" for popular games. The primary redirector URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-link-blogspot-2021-game-hack, is flagged as malicious. The document body and embedded artifacts suggest a lure to trick users into clicking these links, likely leading to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-blogspot-2021-game-hack In PDF document text
    • http://ghknights.org/images/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • https://www.ghknights.org/images/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.ghknights.org/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://www.ghknights.org/images/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.ghknights.org/images/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003389.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3389 24668 bytes
SHA-256: b6f6392e799df17cb3bd294e24684ec46ff98ba65173f915c149353dc0dc2485
font_01_sfnt_off00006bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF6 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000075a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A8 19036 bytes
SHA-256: a1db0e26d638f2546736f1f7b434dee98a1c5e726f40723477b7c203db66759e

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