Malicious PDF — malware analysis report

Static analysis result for SHA-256 3231c5d569940f36…

MALICIOUS

PDF

40.8 KB Created: 2021-05-22 22:34:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d86cf7048ebf8c996750e76b575870a6 SHA-1: 89a76e554db2d8897dfce73a7a25e68cdeb320c8 SHA-256: 3231c5d569940f363f33a05e66adc94819a26eb0f53e0e0ee46f0a8c324485f3
102 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 0.7508

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/coin-master-free-spins-2021-game-hack PDF link annotation
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfPDF link annotation
    • http://103.30.145.97/__statics/gudangsoal/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-link_GM406889139.pdfIn PDF document text
    • http://103.30.145.97/__statics/gudangsoal/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://103.30.145.97/__statics/gudangsoal/files/tower-of-hell-roblox-hack_GM431946152.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_off000033c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C2 27848 bytes
SHA-256: 4a370d8b0c5cb2e029ed5eab03952a8b6e135609d41a9d8752e2fba47f3004b0
font_01_sfnt_off000073f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F4 2872 bytes
SHA-256: 4ec72e81aa0e0899a044795e8683e2fd4acb614786e8f4b11bb8481319db316f
font_02_sfnt_off00007ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDB 18288 bytes
SHA-256: 9f7609fba99e53c6baa99bb04d1c7e3f9b7167131c1520eb2a413cdab4a14871

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