Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a92e47b156dbcf…

MALICIOUS

PDF

33.1 KB Created: 2021-07-04 19:41:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d7791634d294677c692b459edfa1d729 SHA-1: c986602de38b21e11cf145f5c1905f8e32d63665 SHA-256: 00a92e47b156dbcfeee06558411d31bd56e31b2b317a538bf83f21c25358b481
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'hacks' for games like Coin Master and Roblox. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-hack-no-verification-game-hack. This pattern suggests a social engineering tactic to drive traffic to potentially harmful sites, likely for ad fraud or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 3

  • 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.
  • 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 http://netcdn.tw/app/406889139/coin-master-hack-no-verification-game-hack In PDF document text
    • https://yeushuen.com.tw/image/data/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/roblox-xbox-one-free-packages_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/how-to-earn-free-robux-2021-xbox-one_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/free-robux-hack-android-2021_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/free-roblox-bots_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/roblox-bighead-hack_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/report-abuse-robox-paist-bin-free-robux-code_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/roblox-cb-ro-hack_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/how-to-hack-roblox-boys-and-girls-hangout_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/free-followers-no-human-verification-roblox_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://yeushuen.com.tw/image/data/files/how-to-free-robux-on-computer_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
font_00_sfnt_off00002f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9C 23192 bytes
SHA-256: 7dc2e29e51885a5a35c238acfc696a66d2488f4673e89a297d06d6d2e9717498
font_01_sfnt_off000063e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 18140 bytes
SHA-256: 584bd634a741abf14746247beb71184038551534d821baf642793c5d967f1edd

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