Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1d62e20edce15e…

MALICIOUS

PDF

38.6 KB Created: 2021-05-24 07:07:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5c7dfdfe56abc9e73d0f2a3e9d8ec28d SHA-1: 8f2ad1c48529d8ed7bce7ac993bbdd84261d8d98 SHA-256: fd1d62e20edce15e7b5905444045e8743defb78ce8c0d85ede65a2afb2f9586a
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 0.8060

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/479516143/how-to-get-minecraft-for-free-on-mac-game-hack PDF link annotation
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-deals_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-robux-that-actually-works-2021_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_002_off000034c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34C9 25204 bytes
SHA-256: bd969fd148a576b9de997ea41988d1f8e1a8e1acd8bcbe76a32847ae20607a71
font_01_sfnt_off00006c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C68 2956 bytes
SHA-256: 4c161c391bc73e4004b9940cc54eeb9b4118c407408b95bbe246d1040997dd1f
font_02_sfnt_off000076a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A2 17872 bytes
SHA-256: b6208a51cd80fab2e9318da305006c0e70657a6f065b62408d4ccaae69eb5aa0

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