Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef654a819f00a6d4…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 09:35:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 334bcf2d72c9dea4f2148fd8271f0063 SHA-1: 194549f68f6718dc8bb7ab8cb00700c8071940d2 SHA-256: ef654a819f00a6d48cf04ed80350e7e3c1fb0b03366095d34c8092160f733a5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising a "coin master attack hack". The presence of a visual download button and the overall lure suggest a phishing or scam attempt. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to facilitate redirects or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-attack-hack-game-hack In PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/roblox-jailbreak-download-free_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005130.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5130 25548 bytes
SHA-256: ab79d8ad3ed196128c7b1a7ced4c96d855317f589c5bd10035f5fa72062857ec
font_01_sfnt_off00008c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C33 17716 bytes
SHA-256: 70399db0e332628e5b8235b330fa983a1f520a6186e18c08c1293487a921032f

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