Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d71b6b726829003…

MALICIOUS

PDF

34.9 KB Created: 2021-06-17 19:32:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6b821371afa50c333068f5867b245aea SHA-1: 2d0e284a409813a9d7c67b1e07939932f346afb3 SHA-256: 4d71b6b7268290031a7b82c3dd02fa2dc9971efb1e03ecfd8df522d7c5889239
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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 http://netcdn.co/app/431946152/free-roblox-itrems-game-hack PDF link annotation
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/robux-free-no-surveys-or-password_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/roblox-highschool-cheats_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/cheats-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/free-robux-tutorial-mac_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/free-valkyrie-roblox_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/jack-hack-roblox_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/which-group-has-free-admin-and-vip-on-roblox_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/roblox-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/roblox-robux-hack-no-password_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/robux-free-hack-2021_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/creepy-hacker-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/hacks-for-bitcoin-miner-roblox_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/roblox-hacks-jailbreak-wearedevs_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/free-robux-website-that-works-no-generator_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_off00003253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3253 22408 bytes
SHA-256: f403188f7db5efd0e2fb23a13de0b80c5835b3330f37f6872143c1a6c9f367de
font_01_sfnt_off00006416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6416 18828 bytes
SHA-256: 4617133d640199408fa4a751f39dcd194ce879db9f8c6820c28b8e948994b72b

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