Malicious PDF — malware analysis report

Static analysis result for SHA-256 877211a913ead897…

MALICIOUS

PDF

35.7 KB Created: 2021-05-22 01:40:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 23f07dde3d35f66527df054996d905f7 SHA-1: 26bde6686d9469bf172aadb2de3a410c30a93b4b SHA-256: 877211a913ead89732d4a81793a27d42d1644bc692c5d9474eabd83a251df8db
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/406889139/100-free-spins-coin-master-game-hack PDF link annotation
    • http://zarinnameh.ir/images/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-roebucks_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-heaven-links_GM406889139.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_off000031fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FA 25080 bytes
SHA-256: 2312d9445d37bb154657556ce3b5480b816cacb957c0b4f397861bf0efdc7992
font_01_sfnt_off00006a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6C 18164 bytes
SHA-256: 9bc61af2acbda784231945e40c4a4bb5d6810b0d04641be6b37b2cdd3c5b78bc

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