Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9b30f554e88bab…

MALICIOUS

PDF

39.5 KB Created: 2021-05-20 23:53:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eb908da63db90c68ea09b8ea517fa033 SHA-1: 1785c2b8b49793be9fe88f4465ee951bfca2f99f SHA-256: 6b9b30f554e88bab5fed381278683f68533cbf17949562b17e5031ac8b442208
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/835599320/free-likes-and-followers-on-tiktok-game-hack PDF link annotation
    • http://wireprod.net/images/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://wireprod.net/images/how-do-you-hack-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_002_off00003299.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3299 26300 bytes
SHA-256: e921ff0a94d36ca9e54ab9cf4bff4510b189038edf07a0532f5cff536e4908cd
font_01_sfnt_off00006ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED5 3224 bytes
SHA-256: e5dd907333534e138a1bf39bb1af7443ae429e747ba76190036c6f26ed413dff
font_02_sfnt_off00007a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A01 17868 bytes
SHA-256: 70fa1c3561f6137577c29e95a190e21e23f2a7189666714f5fb2593f9ced88b5

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