Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ef06350cfe2209…

MALICIOUS

PDF

226.7 KB Created: 2021-07-09 03:50:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2cf8f589bf6bd20e96943f537edc577d SHA-1: d48fe301bc811fe9c3c2569dcb024653d96e7883 SHA-256: b7ef06350cfe22095b422b9bbd5130bac0b46a881195055d0fc766e3073cbd5c
250 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple high-severity heuristics indicating it is designed to trick users. It includes a lure for a 'free generator / game hack' and a fake CAPTCHA, both pointing to a malicious redirector URL. The document body, though heavily obfuscated, contains references to game hacks and potentially malicious URLs, suggesting a social engineering attack to drive users to malicious sites.

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-offers-game-hack In PDF document text
    • http://library.stikessuakainsan.ac.id/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-kick-a-player-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/dget-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/pagina-con-hack-para-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-roblox-jail-break-hack_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-imac-hack_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-anti-afk-hack_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-story-mode-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/best-roblox-hack-2021_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_off0003203f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3203F 25576 bytes
SHA-256: 44ba8cd2b14cfc4c29059c2b744ed836eb778a1b5f540c355c201f5e04332820
font_01_sfnt_off00035c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C3B 18360 bytes
SHA-256: 890c24416e4fff412ba4b8178510829bfd290aeb73f56a788a59b60094e15169

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