Malicious PDF — malware analysis report

Static analysis result for SHA-256 36772b11767b2bb9…

MALICIOUS

PDF

40.6 KB Created: 2021-05-10 13:15:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c1fc7e319997af3ed125cc0aacfe057a SHA-1: 1cb6d4136c087cf81f310fbc6178332ccae911f1 SHA-256: 36772b11767b2bb9a079926874a6b1418679a1c5b9dfe082ce57d3ef31ee16d2
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 0.8959

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/coin-master-free-spin-and-coin-link-today-game-hack PDF link annotation
    • http://agritrade-ukraine.com/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/best-way-to-hack-coin-master_GM406889139.pdfIn 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_off000038dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x38DC 24968 bytes
SHA-256: 9c9524f5f5c5f63df88181cd794ffb826f74fee96033b429b2ced36d18322d02
font_01_sfnt_off00007160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7160 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off00007c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3F 18412 bytes
SHA-256: 5606d742d49c2f618a839db89fb2f395f675f912dcc06d31cfc3972fb9700339

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