Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b0c6c7c2c13e31…

MALICIOUS

PDF

46.6 KB Created: 2021-05-11 20:43:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f7e9f76fd7b6f14ca26fec26ff6f3666 SHA-1: 802e005aedc833bcd9d91161c39f82dce356fc69 SHA-256: 86b0c6c7c2c13e313033f63d83ce1be9e61057f44bef9ae3aa95c9350c306581
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-apps-that-work-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to trick users into visiting malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/free-robux-apps-that-work-game-hack In PDF document text
    • https://europainstitut.hu/images/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://europainstitut.hu/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-download_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://europainstitut.hu/images/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/how-can-i-get-free-spins-on-coin-master_GM406889139.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
font_00_sfnt_off000048d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48D8 25796 bytes
SHA-256: ce85c6661d01f0a541a1adcc3d86107074c206f2f106c9c0a7945c171245b750
font_01_sfnt_off00008582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8582 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off00009124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9124 19056 bytes
SHA-256: 867cc7ed7a05e00a705c8433c5324c57a550f7e7678a2e8c50298e1974253cec

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