Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd5447995e0bd36…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 01:28:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b0bf718c57123a4e1ef2ccf55444a0a0 SHA-1: fd4a2863a5621971cb4df4e96abb09a6fd93121e SHA-256: 3cd5447995e0bd3687d5940ed25d38dcccc5a0876238b9b3cef93b40ee1aab72
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks'. The primary lure URL, http://netcdn.tw/app/479516143/how-to-make-your-own-minecraft-server-for-free-game-hack, is flagged as malicious. This suggests the document's purpose is to redirect users to potentially harmful websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/how-to-make-your-own-minecraft-server-for-free-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-glitch-xbox-one-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-gameplay-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/unpatchable-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-glitches-and-cheats-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-free-draw-2-script_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-blood-moon-tycoon-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-cheat-engine-table-and-bypass-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/chara-undertale-for-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-use-cheat-engine-62-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/dife-ml-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/is-free-robux-real_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_off000032bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32BC 23188 bytes
SHA-256: cff11341a05c61981b76299b4c9cd5abfae4fa9d5dd369eb3ed37c2317d4eb74
font_01_sfnt_off000066bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BD 18748 bytes
SHA-256: 1b423bc8ae820a2c2eb73a9c501cf7699a28ccef7ea595eb2009fa638697dee6

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