Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e164f3115ccf9f6…

MALICIOUS

PDF

36.2 KB Created: 2021-06-19 01:23:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 525be25bf4d1fd05b5110121eb0e7f0c SHA-1: 56dde99038a1efbfc767d8d15d48ed43c056d0f2 SHA-256: 6e164f3115ccf9f6914247ae236d6fd1a9294f333c6d5b283b7f4b8501ee5e0b
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and extracted URLs suggest a lure related to game cheats and hacks, aiming to trick users into downloading potentially malicious content. No scripts were extracted, but the presence of malicious redirector links and the overall context strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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.co/app/431946152/new-roblox-exploit-wizard-simulator-hack-god-mode-autoattack-1.mp4-game-hack In PDF document text
    • http://zercalo.org/images/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/good-avator-free-20-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/roblox-royale-high-dimond-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/easy-roblox-hack-client-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/pubg-uc-cheap-price_GM1330123889.pdfIn PDF document text
    • http://zercalo.org/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/robux-hack-real-no-human-verification_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/get-free-robux-without-downloading-anything_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_off000031c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C5 22712 bytes
SHA-256: 3e2c96e51e96ddfeabed6c5fe9eb0cca2c5f8ff3f8a5695bb3071dfe09855026
font_01_sfnt_off0000648e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648E 20320 bytes
SHA-256: c4289948bf95e4525ec8a44232dde52bbfb20715e56294f8f30280891ba1fe17

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