Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1e265a5b9b6db5…

MALICIOUS

PDF

33.6 KB Created: 2021-07-02 01:14:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 76e5ff992854e973b9859a20b53a6108 SHA-1: 19577ac4d6cd70e50a4034fc3105dd5ab932efa5 SHA-256: 2b1e265a5b9b6db5e0ae63fb5f09fe4978d998d52a30c19c1da5cb0940452035
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs that lead to a known malicious redirector, disguised as a 'game hack' lure. The document body and heuristics indicate a phishing attempt to trick users into clicking malicious links, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/how-to-hack-models-into-roblox-t-shirts-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/www-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/near-pubg-uc-code_GM1330123889.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-level-7-free-exploit_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-gamepasses-for-roblox-op-as-f_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-1-million_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-earn-free-robux_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
font_00_sfnt_off00002b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B01 22444 bytes
SHA-256: 52261f5f5de999904a065d446a7f1ed2bd04ce27e2b3355ef47ec2df8cc708fd
font_01_sfnt_off00005d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D41 19580 bytes
SHA-256: 4b612cb40fd3f91399c41a619220183760c0480ddebe3948f4972b06936051ea

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