Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc9c4d2022bdbf3…

MALICIOUS

PDF

226.3 KB Created: 2021-07-03 20:22:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e68fff7a08a347f9bfef1d0753d3cd3d SHA-1: 1510685b39313498d89b8f7330d655762219a60e SHA-256: ddc9c4d2022bdbf3393e29eceb20b765c78ca74118ce40674fc68ee0ee5d2dd4
132 Risk Score

Malware Insights

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

The PDF document employs social engineering tactics by presenting a fake CAPTCHA and a lure to install a browser extension or update. It also contains an embedded URL pointing to a site offering game hacks, suggesting a lure for users interested in free in-game currency or cheats. The document's content and heuristics strongly indicate an attempt to deceive the user into performing an action that would likely result in malware execution or credential compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0117

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.tw/app/1094591345/how-to-get-pokecoins-pokemon-go-free-game-hack PDF link annotation
    • http://www.biochemix.com/uploaded_files/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/jailbreak-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/fly-hack-roblox-no-virus_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/snaypes-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/roblox-free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/roblox-shadowrun-free-pass-code_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/youtube-cheat-central-robux-july2021_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/roblox-download_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/roblox-schrei-simolator-hack-script_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/free-roblox-accoiunt_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/free-robux-by-bananaman-world_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/cheat-engine-roblox-bypass-2021_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/increible-hack-robux-pastebincom-80b1sjzp_GM431946152.pdfIn PDF document text
    • http://www.biochemix.com/uploaded_files/userfiles/files/free-credit-cards-for-robux_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
stream_023_off00031d57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D57 25576 bytes
SHA-256: a5cff25b05ea4bd0663937014c5f51685e17ab8588ee3d6feffe0770352b9084
font_01_sfnt_off00035943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35943 18744 bytes
SHA-256: 3edbda6fb8a435c255af7df5b3aab39eb7e3f26ed18762ffb89d1c44519c5c3d

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