Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69cfc3ff5f7f7e9…

MALICIOUS

PDF

36.0 KB Created: 2021-05-22 00:36:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ffe643b3f7648b7f9e1d5d2502a5e620 SHA-1: 6683b8e15d30b3477d16f03fadd64c6cd26f6fe2 SHA-256: c69cfc3ff5f7f7e9c0f29ea0f9465018f7fee4547f5f29e0ae2ce56e7537caf6
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 0.9710

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/431946152/free-robux-no-verification-game-hack PDF link annotation
    • https://zapoj-kharkov.com.ua/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://zapoj-kharkov.com.ua/images/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://zapoj-kharkov.com.ua/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://zapoj-kharkov.com.ua/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://zapoj-kharkov.com.ua/images/coin-master-hack-app-2021_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_off00003271.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3271 24608 bytes
SHA-256: 376de48d74a69ad844178b282e1fb9e7d643cee770ed6d2b19aaa1b5939240ec
font_01_sfnt_off00006a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6C 18600 bytes
SHA-256: 361892a278de990f6dfe9fe9f512a0ec39aeba1740037781b92f32c6ad2b5051

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