Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd3b2714425fca0…

MALICIOUS

PDF

44.8 KB Created: 2021-05-19 11:11:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 64eabb9ffe8e3d5fd573ec39296dbc3a SHA-1: b1ce947a0ca8346c0965c80ac7cd2f0b77efdcbb SHA-256: dfd3b2714425fca040daafa2c3976a93e44d70d952d4b605d7dc3a54087372ec
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with it, likely to initiate a download. The embedded URL points to a resource that appears to be related to game hacks, suggesting a lure for potentially unwanted software or malware. No scripts were extracted, limiting the ability to determine the exact execution flow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/431946152/robux-offer-wall-game-hack PDF link annotation
    • http://www.flotom.at/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/coun-master_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/give-me-robux_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://www.flotom.at/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/pokemon-go-free-legendary-hack_GM1094591345.pdfIn PDF document text
    • http://www.flotom.at/images/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.flotom.at/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48E4 24880 bytes
SHA-256: 2de6111fe581051b4986ce2809f9092cae8224b49a0686cd45d2e0b5e515eba4
font_01_sfnt_off00008247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8247 2896 bytes
SHA-256: 0f10adbf105d053971010bc1f17c4dd55814d599674c84f75a6eb4cb46a9c89b
font_02_sfnt_off00008c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3D 18348 bytes
SHA-256: fa82912c9e36e73f744cfc3a856a8c89ccc54bfc28e0c80a649179b290e2af39

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