Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25ad0d4adb7295f…

MALICIOUS

PDF

44.8 KB Created: 2021-05-17 05:44:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b9f323f4d8e4af85d3de1ad7d5029606 SHA-1: 6c3ee71624f89a4e4fb4d000707b3f2eba6bfbac SHA-256: b25ad0d4adb7295f609e78482e329e2aad3cc74c49e1d6c323b1ef8547f1a86d
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into clicking a link, which is a common social engineering tactic. The embedded URL points to a resource that likely serves as a download for a second-stage payload. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction to initiate a download, potentially leading to client execution.

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/406889139/free-coinmaster-spins-game-hack PDF link annotation
    • http://www.popikalogirou-realestate.gr/images/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.popikalogirou-realestate.gr/images/minecraft-free-no-download_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004937.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4937 25320 bytes
SHA-256: ac91ed42069aa98dfd365ef2955147d4f2efa35b61333b0d870270e3dc13ab1a
font_01_sfnt_off0000832b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832B 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D16 18148 bytes
SHA-256: ba216d9844178078b6875fb667333aee6c8c15dd3bf3ba058f093208140005b7

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