Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c85e997ff52562…

MALICIOUS

PDF

41.8 KB Created: 2021-05-11 08:38:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: dbccfdebbf34dd174022c5a54b5128da SHA-1: 48c8d2d71b3cfb1b58a86210f9bb0a283e078674 SHA-256: e0c85e997ff525620eccf097be39cc2ab68d01b4aca942689b8ec71b0a553072
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The document body and embedded URLs suggest a lure for users seeking in-game currency or cheats, which is a common social engineering tactic. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-coin-master-spins-without-human-verification-game-hack, which is part of a known malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-coin-master-spins-without-human-verification-game-hack In PDF document text
    • http://elsenorcafe.com.co/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/robux-game_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/roblox-hack-apk_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_003_off000047f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F0 24844 bytes
SHA-256: c110f9445587f06ef2ef401360a4288fd4229e27604835c2f74d287a5eac1cbc
font_01_sfnt_off00007fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAD 18784 bytes
SHA-256: 2ea73084728f1b585ff149514882d7306693ae2bd3bbffba62615d44dd485d67

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