Malicious PDF — malware analysis report

Static analysis result for SHA-256 396fa0fe93da1af7…

MALICIOUS

PDF

35.1 KB Created: 2021-05-21 17:00:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0d94c6343c2ad52e19fffe2c61d87658 SHA-1: 10be8381863312a5e65ab78af6546a47878f1b9e SHA-256: 396fa0fe93da1af72d182e4d73947ba054c92f2418956ecee0f7951dabc30195
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent lure for a 'Coin Master Free Spins Generator' and a call-to-action button, directing users to a suspicious URL. This pattern suggests a phishing or scam attempt, likely to lead users to a site that may host further malware or exploit kits. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/blogger-coin-master-free-spins-game-hack PDF link annotation
    • https://chitfund.com/uploaded_files/userfiles/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/free-roblox_GM431946152.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.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_off00003162.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3162 24280 bytes
SHA-256: d91ee38148f2ec78a457821650a91c420d157239d2868fd2298b240a5e2dac10
font_01_sfnt_off00006740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6740 18464 bytes
SHA-256: 0911799b9aa5b6ecf8f75e1ae71094da345a4ed5579c86b7800e8f9c3f9f610d

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