Malicious PDF — malware analysis report

Static analysis result for SHA-256 66192d4a939b93c2…

MALICIOUS

PDF

34.8 KB Created: 2021-05-21 10:15:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d5b311ed9b9c5fdfb0de6aa135f2f423 SHA-1: d30fe54a9e1f103f95f28be9e4b2c24f355e78a4 SHA-256: 66192d4a939b93c220d3254f3bbfd1ef3a98d0293791fad34c01d6575ec9c889
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body explicitly mentions 'Get Free Spins For Coin Master' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', indicating a lure for potentially unwanted software or malware. The heuristics confirm the presence of malicious redirector links and a game hack lure.

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/get-free-spins-for-coin-master-game-hack In PDF document text
    • http://bogatyr.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://bogatyr.com/images/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/free-roblox-followers-generator_GM431946152.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_off000031a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A5 23876 bytes
SHA-256: 42df1c356fa98659b72f6c9875aa3c8ed978040688f5dfef220c1513633dfc62
font_01_sfnt_off000067b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B1 17884 bytes
SHA-256: 9bf67b2ee87cdcf37b0aaa2d40e70a5836dac1840b9be614bff5a3f1a0edfaa7

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