Malicious PDF — malware analysis report

Static analysis result for SHA-256 5726ed02e59c2e6c…

MALICIOUS

PDF

39.3 KB Created: 2021-05-13 22:02:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3e11e0c18068d746d9497762b3c8a06f SHA-1: 6d2ada7c81de9f80e9aba7ff33a2e5ef90f5a86d SHA-256: 5726ed02e59c2e6c3c82f9f882b68ab4269c90469e90178735fa8faff2c6c413
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'Coin Master Free Snacks Link' and a 'Coin Master Generator'. The document body and heuristics indicate a lure for a game hack, which is a common social engineering tactic to trick users into visiting malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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-snacks-link-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003412.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3412 24952 bytes
SHA-256: 464b87ce118f400e16b4e21e0eb69b590c9a8355248202cdf07f49371a7c2169
font_01_sfnt_off00006ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA9 3604 bytes
SHA-256: ead41f9d39711eba667feb01c27f0b7e82919726a9aa2ca181059bfe98c66c01
font_02_sfnt_off00007959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7959 17880 bytes
SHA-256: 09034ee7a1f9989932e9db65c2957a4d9f61d6fccc52a1ac5f57be2128ce07e5

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