Malicious PDF — malware analysis report

Static analysis result for SHA-256 092673a8533912d8…

MALICIOUS

PDF

45.6 KB Created: 2021-06-01 23:11:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1b67cd42b84dc673bb5c2dd00ae6a155 SHA-1: a0ac881d9d368c6123db1a6ccc7553caf31fe494 SHA-256: 092673a8533912d880c20e0bc17ec142110c77fa1c0c474e12f1e8e3b1e9d3c5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically targeting users interested in game hacks and generators. The primary lure URL is https://netcdn.xyz/app/431946152/free-roblox-model-game-hack, which is associated with a critical heuristic firing for malicious redirectors. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or redirection attack to deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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.
  • 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 https://netcdn.xyz/app/431946152/free-roblox-model-game-hack In PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/hack-para-atravesar-paredes-en-roblox-2021-en-cualquie-juego_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-roblox-bubble-gum-simulator-accounts_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-hack-diamonds-in-royale-high-roblox_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-get-free-robux-using-cheat-engine_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/50-robux-free-codes_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-get-free-robux-inspect-hack_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/cheat-bad-business-roblox_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/roblox-dbz-final-stand-hack_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/escape-the-supermarket-in-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-robux-working_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_004_off00005315.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5315 26156 bytes
SHA-256: 9aaf83ac85f06ab6052e66cad2fb2404382b4a72adfae5e9f8d7152590c83a70
font_01_sfnt_off00008fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA2 18316 bytes
SHA-256: 173d344cf656013143b73629c1071d52c245411c2256186b6299b02f6efe70a4

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