Malicious PDF — malware analysis report

Static analysis result for SHA-256 0481b425cfad7c8f…

MALICIOUS

PDF

37.8 KB Created: 2021-05-23 04:36:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6a31f40442b3b7e4ae137f325a590c94 SHA-1: 8fe43c975c2c1c0c694a4516c24216b061ea8a43 SHA-256: 0481b425cfad7c8f158ba53e6f70c3554a8067332825cbe4c40a20a1716dcb30
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 0.7010

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-hacks-game-hack PDF link annotation
    • http://www.niarads.com/images/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.niarads.com/images/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://www.niarads.com/images/instantrobux_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.niarads.com/images/how-to-get-free-robux-fast-and-easy_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_off000031cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31CB 24656 bytes
SHA-256: 9746e8cd25360a0e40eb3f011d6552c44e59168bff7044ca27763d4f764cc157
font_01_sfnt_off00006a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A20 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000073d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D2 17716 bytes
SHA-256: c15a8689411d8cca9ab0759ab4c496fe9b4353d676dd738e300719e9588112ed

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