Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e327f4eb11c80e…

MALICIOUS

PDF

34.4 KB Created: 2021-06-25 20:28:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 936449581838a55eb68360c354f74551 SHA-1: 6629a8a427d69063bf8ac8b55296886753282fc9 SHA-256: 73e327f4eb11c80e88294c3ba0935dc2b70d11f88ee8d238a850b0d50dff701a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and generators, directly linking to a known malicious redirector. The document body and embedded URLs reinforce this theme, aiming to trick users into visiting the malicious site. No scripts were extracted, but the primary malicious action is the redirection to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/roblox-waepon-simolator-hack-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/rbx-claim_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-purchases_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-teleplate_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-money-in-roblox-adopt-me-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-hack-android-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/descargar-menu-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-spin-link-for-coin-master_GM406889139.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_off0000302e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302E 21760 bytes
SHA-256: 1b9f056448990db5d2fb1a19a1706aa355cbe677ad5ce25755765fd979df2959
font_01_sfnt_off00006013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6013 19512 bytes
SHA-256: 94ae0a24d1bc07f567ceb3a624665dcdce712c1ab02a8e3f40c7059b475aa6d4

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