Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee095656d061546d…

MALICIOUS

PDF

40.3 KB Created: 2021-05-10 23:20:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5e8c64127731cc4074b050523100b5e9 SHA-1: d1fa0d4cbe1e8bcb53ed568170186357381e813b SHA-256: ee095656d061546d10023a3bfe77c613ad583d5592cd8fd857adb4a755bfe9be
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical link to a redirector that leads to a "game hack" lure, designed to trick users into downloading further malicious content. The document body and embedded URLs reinforce this lure by referencing game hacks and generators. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a malicious link within the document.

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/coin-master-gifts-game-hack In PDF document text
    • http://mbbs.hr/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/robux-gratis_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-o-get-free-coin-master-spins_GM406889139.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_off000045b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45B2 24456 bytes
SHA-256: a8e68ceb31ba3dc7587c496446c867c926efdfa1c01f7de9f9028095e91c54c5
font_01_sfnt_off00007d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D12 17544 bytes
SHA-256: 4fccc7f2e5b87b3b3bbfe27ac594c5d73c76fe2ff8079911e64f341337cd8bef

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