Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a235417b82ee106…

MALICIOUS

PDF

43.2 KB Created: 2021-05-13 15:39:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 22e884e9f438a06d187c254a077431cf SHA-1: a97975a42e5dd0516b1b4974da0a83ab6c5da83b SHA-256: 4a235417b82ee106f2669cf97c6d336a334026764297d6373e926f915580da92
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document that contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. The embedded URL and numerous other URLs point to sites offering game-related cheats or hacks, suggesting a social engineering pretext. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/roblox-generator-com-game-hack PDF link annotation
    • http://bijbelreizenisrael.nl/images/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/generator-robux_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-free-spins-hack-link_GM406889139.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
stream_003_off00004998.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4998 26420 bytes
SHA-256: 8962efeecfbbcb236007d8a5a13ad21e445e65f63fdb45d871d79cf9534a56e6
font_01_sfnt_off0000863f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863F 18376 bytes
SHA-256: f82f7cd631513f9855343e536b8ab499af2fdb27f4ce1349c9137e16bc695ffd

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