Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3a7fbb9e679d53…

MALICIOUS

PDF

48.5 KB Created: 2021-05-15 07:04:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e570e37d001f88d515e14776189074ab SHA-1: 11d5116497b019217d076e83cf021301385c32ff SHA-256: 9b3a7fbb9e679d53718a7561cad239aaba64729f026d9442976a87da62f3ff48
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt to trick users into interacting with it. It contains an embedded URI pointing to a URL that likely hosts a malicious payload. The document body and extracted URLs suggest a lure related to game hacks or rewards, a common social engineering tactic. No scripts were extracted, but the presence of a fake CAPTCHA and external URI strongly indicates an attempt to execute further malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-rewards-coin-master-game-hack PDF link annotation
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-apk-mod_GM406889139.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_off00004f01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F01 25668 bytes
SHA-256: db15f3622f25fd5cb11b6f00136d30ec002b0eb79518e955c167a8ed08b7c63c
font_01_sfnt_off0000874e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874E 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD9 18048 bytes
SHA-256: d52e1ade79c91b20aaae42cc68d8a6fc3da24a75956dc290bca91eb62f279afe

Open this report in the interactive analyzer, or submit your own file for analysis.