Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5badd9467f5567c…

MALICIOUS

PDF

227.0 KB Created: 2021-07-05 01:39:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 35c5545bab1e2b497bba3a4390cc2fb4 SHA-1: 59030759f2b4aa529ff92a9fc44002722fe09dc5 SHA-256: d5badd9467f5567cad8b1dbe31dc47f084293938b1e4dc0ef9be09a338e0210b
172 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it's a lure for game hacks and fake CAPTCHAs, directing users to a specific URL. The document body, though heavily obfuscated, contains references to 'Pokemon Go Free On Iphone' and the same URL found in the heuristics. This suggests a social engineering attack to trick users into visiting a malicious site, likely for credential harvesting or further malware delivery.

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/is-pokemon-go-free-on-iphone-game-hack PDF link annotation
    • http://perpustakaan.poltekom.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-giveaway-live-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/cripthe-poodle-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-ipad-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-free-robux-unlimited-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/download-roblox-hack-v2-1_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/hack-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-hack-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
stream_023_off00032035.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32035 25576 bytes
SHA-256: 459ea2566970ce926a5f14a0a6e7a2e70d74395ecb29f5594af648e39fc3f539
font_01_sfnt_off00035c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C3E 18700 bytes
SHA-256: eedeebf04efc9b61c40ab4c5b719196b60fb7913c640f184d2e5d47c112a567d

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