Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfe47932f7b69c4…

MALICIOUS

PDF

36.4 KB Created: 2021-05-25 11:01:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d1609ac5558bea47a398f8e2dd330a25 SHA-1: ac1e2c65b81c5d0ad99dd5d7f1f379f5fa16ac40 SHA-256: dcfe47932f7b69c464b3919347b77012aa62a8cfd153fdb110d597bf01ff2b57
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a lure related to 'free spins' and 'game hacks' for popular games like Coin Master and Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly suggests a malicious intent to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a social engineering tactic to trick users into visiting malicious domains that likely host malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-spins-coin-master-2021-game-hack PDF link annotation
    • http://www.pspmrsmbpj.com/opac/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/minecraft-hacked-apk_GM479516143.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_off0000341b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x341B 24764 bytes
SHA-256: cf4fad6cb624b155a66c338bde6454e349eda6c11d4c787170d46031d6815758
font_01_sfnt_off00006ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEB 18288 bytes
SHA-256: 9732707b45c862b7a6ef8ea2418900def9be3650c6b325207d932644f64622ad

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