Malicious PDF — malware analysis report

Static analysis result for SHA-256 9951f1f577ad9edb…

MALICIOUS

PDF

226.6 KB Created: 2021-07-06 10:03:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0635bcc6091121227e16e9953c67646d SHA-1: 77cf45611010c0e6051deeb32834210e5201f4d1 SHA-256: 9951f1f577ad9edb4fb0b77454de5cee33a435275e5b636bd44b9a16dced5456
172 Risk Score

Malware Insights

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

This PDF document was flagged as malicious. It uses a fake browser/software-install lure and a fake-CAPTCHA lure. 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 clean score 0.0118

Heuristics 7

  • 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.
  • 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/pokemon-go-free-healing-game-hack PDF link annotation
    • http://lib.mappifhui.org/repository/how-to-generate-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-hack-hack-de-robux-2021-android_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-on-roblox-inspect-element_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hack-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-dumb-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-murder-mystery-2-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hack-to-bypass-roblox-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-make-your-own-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-female-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/get-free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-no-inspect_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_off00031f39.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F39 25576 bytes
SHA-256: a8d9a98d669003c05ea8960a5fa4093eed7d0d3f06d43ad7c11474a53c80272a
font_01_sfnt_off00035b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B40 18552 bytes
SHA-256: df85967bdc0fe4147b2e367d8bb8a08d8bdcb77f6ca6fa9042699e345cde4948

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