Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e41ba1dfcb4d9cc…

MALICIOUS

PDF

45.6 KB Created: 2021-05-11 19:02:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2dd8fc461fab91060c61a74a1f1266d4 SHA-1: 06786a950f0b222ce97330deeb154038e627fb6c SHA-256: 6e41ba1dfcb4d9cc9c3dc86cdaf014e54e6e26a942ae91fcfaa2265c9c212bdf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free Robux and game hacks, directing users to a known malicious redirector. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/get-free-robux-2021-game-hack In PDF document text
    • http://mycounty.com.ua/images/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-coins_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://mycounty.com.ua/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/roblox-demon_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-minecraft-codes_GM479516143.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_003_off00004a90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A90 25440 bytes
SHA-256: e043efa104555553cd70265d5dfa171778837c1012f56e8ff36043b546288808
font_01_sfnt_off0000853e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853E 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEF 18520 bytes
SHA-256: 6fe0ff66a16b6ee6dc50657e9361d5c62c74e6da0263e26ac7f67f588141101f

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