Malicious PDF — malware analysis report

Static analysis result for SHA-256 707667ab94242771…

MALICIOUS

PDF

227.7 KB Created: 2021-07-04 06:10:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a7d0353abce2d7c13092e2fbec25d46b SHA-1: 3135298015fd8ea81c3949a6e24f67c908003640 SHA-256: 707667ab942427718c9237135efe6f514b3135029215918bc9cac04f06130b79
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 and a "free generator / game hack" theme. It directs users to a known malicious redirector URL, which is likely intended to lead to malware download or credential harvesting. The document body, though heavily obfuscated, contains references to the malicious URL.

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-download-hack-game-hack In PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/get-unlimited-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-mobile-hacks-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/hack-roblox-block-piece-autofarm_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-adopt-me-cheats-2021_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-roblox-exploi_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/static-moonactive_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-18-9-hacked-client_GM479516143.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_off0003222d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3222D 25576 bytes
SHA-256: 0cb61dc80f37d9d0774a82f2ea67fd47fa9733a808fd1c39adbf036d9e776772
font_01_sfnt_off00035e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35E2D 18940 bytes
SHA-256: 2130039d879bda5726d52325abb2b4df079fb002f4e0372771d42ec3dbc3fcd1

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