Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2df678c41efbd4d…

MALICIOUS

PDF

45.1 KB Created: 2021-06-11 10:20:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8eee33bec1fde8f4538fa13e0a67cc98 SHA-1: c8f2c105e8e71c43b37057a276b5ac74f11f9e4a SHA-256: b2df678c41efbd4d3a9d3f52a2216e9a56039a14815a1ef28574e5c35a10ff76
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as free game hacks or generators. The primary link directs to 'netcdn.tw', which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick users into downloading further malicious content, aligning with common phishing and exploit delivery techniques.

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.tw/app/431946152/how-to-rank-hack-roblox-game-hack In PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021-unpatched_GM431946152.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/tiktok-free-views_GM835599320.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/roblox-free-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://jormix.co.id/ckfinder/userfiles/files/how-to-download-minecraft-hacks_GM479516143.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_off00005275.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5275 25792 bytes
SHA-256: 7f9298f217732b229dab3370934ef9e26e2e9f1234e813158541baf18ebea4b9
font_01_sfnt_off00008d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2A 18344 bytes
SHA-256: debc4fd206e9ad8fbb918ddd56edf6916a78601919dfd937b3a1742cda5909b7

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