Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18ccf904cce2cd3…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 06:02:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: dd6a0fcb7f758f2eab1fabcccf5dc19b SHA-1: c8f4980c127eb30bb7ff9826e80b480cd112b826 SHA-256: c18ccf904cce2cd3843ab2346318f2181096a2c46117c6bda12131740b4a733d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to known malicious redirectors, masquerading as free game hacks and generators. The primary link directs users to 'https://netcdn.xyz/app/431946152/roblox-free-download-game-hack', which is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt, likely using embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/roblox-free-download-game-hack In PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-ban_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A5 24924 bytes
SHA-256: ffd9dac9033738381f981c73b84494f5c38221c595cc9a972d726ea869c51ad0
font_01_sfnt_off00008194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8194 18680 bytes
SHA-256: 4713be9169544f6656b4c8be21c2a58d7eafaa04b5602a230b8b1e84fc41e5af

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