Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f23ee93301c8993…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 09:12:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 116f7f778dd22fd5fdcd75d3bbde7f9f SHA-1: 6b786daca865bb86b13ddca7103aa744165efe2e SHA-256: 7f23ee93301c8993ca5bc05f6293793d975ad6a4c3d0db53fa493ffbb0790330
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase designed to lure users into clicking on a URL that leads to malicious infrastructure. The primary URL, http://netcdn.tw/app/431946152/roblox-hacking-website-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at tricking users into visiting potentially harmful sites.

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.tw/app/431946152/roblox-hacking-website-game-hack In PDF document text
    • https://alimi.com.tw/upload/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/did-roblox-get-hacked-2021_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-team-changer-hack_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-bloxburg-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-for-roblox-pc_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/descargar-hack-para-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-girl-hair-roblox_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_off00002f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F02 22088 bytes
SHA-256: e346c01239dc394342e00182c5700beb4938c0db996d5d39cbb36cbc3cd5c9cb
font_01_sfnt_off00005fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC1 19076 bytes
SHA-256: 62b0d36ce948ffdc11f28ab91e3b337edea8e9919308700d4ef5645592577123

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