Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4987ce3facb2d68…

MALICIOUS

PDF

41.8 KB Created: 2021-05-10 13:56:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ad7794653957cb7c671c985dbc08cc8b SHA-1: abf173bf741892bbdcbba32802bb7e7cb72bc127 SHA-256: f4987ce3facb2d6859f7fe1076bb33c1af194df8c1c69b46ffbae77991e7b1dd
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 0.8964

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/apps-to-hack-coin-master-game-hack PDF link annotation
    • http://bogatyr.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://bogatyr.com/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/doctor-louie-roblox_GM431946152.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_off000039aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x39AA 27744 bytes
SHA-256: e8e538835f082cd6d1c090c9c2e9fde38e64802302ee4c220c14c0c479d12b27
font_01_sfnt_off0000792e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792E 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000082ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CE 17892 bytes
SHA-256: ec9c2c954b0ae415002c25bf965fc53f3e3020b30477345a3b66b9e13b139acf

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