Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd48fbd1cd4c638…

MALICIOUS

PDF

226.3 KB Created: 2021-07-06 06:13:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b5a2441f26a24041dc07544acedb6881 SHA-1: 7a526778a0539067c3719687d248d8e6e30338da SHA-256: 4dd48fbd1cd4c638f5f29889c55901d1edccac639b999f5bc37edf9ddef39a0f
250 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating social engineering lures, including a fake CAPTCHA, a browser extension installation lure, and a payment redirection lure. The primary lure appears to be a "free generator / game hack" disguised as a CAPTCHA, directing users to a malicious URL. This suggests an attempt to trick users into downloading potentially malicious content or visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 7

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-account-generator-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/auto-hockey-roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-roblox-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/best-roblox-free-model-animations_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/script-injector-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robloxcom-free-bc_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/for-roblox-launch-for-free-vip_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/tiktok-free-skin-ml_GM835599320.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/https-www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/exploit-engine-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-2021-winwos-8_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-do-you-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-getter_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-designs-for-streamers-roblox_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_off00031dd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31DD9 25576 bytes
SHA-256: 5ab4e66b0a8d4bfe67db419fe87c80eed62115ab2a424e20824f505b70cc072e
font_01_sfnt_off000359d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x359D5 18604 bytes
SHA-256: 9b080b5be5c31400b8ff9891e69029f427dd16b9eb8623aec582be3bb57d2a29

Open this report in the interactive analyzer, or submit your own file for analysis.