Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0184ba68e421684…

MALICIOUS

PDF

43.6 KB Created: 2021-05-17 07:37:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 030f9e247a448989abe8aa795ca416a3 SHA-1: f0d110021f8900948e62c1faaf81b683ecdf4cd8 SHA-256: a0184ba68e421684d52a807655c9f96a3ed43ed64a08a4a65e6b745cd131652d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, disguised as a 'free generator' or 'game hack'. The document body, though heavily obfuscated, contains references to these lures and the primary malicious URL. The heuristics indicate that the PDF is designed to trick users into visiting these sites, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/robux-earner-game-hack In PDF document text
    • http://nationshield.ae/userfiles/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/rbx-website_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-hacks-for-mac_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_off00004ac9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC9 26584 bytes
SHA-256: 2cb350f1511f2e56c4d0c7bf568e9b539a78ab0d0a8b2fa5685d042da705e2a4
font_01_sfnt_off000088c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C5 18076 bytes
SHA-256: f5a75b1f1fd7f518e5c7427b096eb9f92d711688fa0aea541fd532851a6f5025

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