Malicious PDF — malware analysis report

Static analysis result for SHA-256 590c62c0c19f1263…

MALICIOUS

PDF

33.9 KB Created: 2021-06-28 07:27:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2d9096f13d62c3f9996a8b061cdb743d SHA-1: c85969f9ba0c8d2dd1ca4f3edec2fcce5ed8a8a8 SHA-256: 590c62c0c19f126399a120f746f6d106b4fba9d8e1441050a930711c59d2cb05
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'hacks' for popular games. The primary redirector URL is http://netcdn.co/app/431946152/100-working-robux-hack-game-hack. This lure is designed to trick users into downloading potentially unwanted or malicious software. No scripts were extracted, but the presence of multiple malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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/431946152/100-working-robux-hack-game-hack In PDF document text
    • https://www.kaojen.com.tw/upload/files/roblox-games-apk-free-download_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-robux-no-survey-2021-ios_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/how-to-hack-your-friends-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/roblox-treasure-wuest-how-to-get-effects-for-free_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-roblox-rs_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/roblox-how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/get-free-likes-on-tiktok_GM835599320.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
font_00_sfnt_off00002db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB6 22040 bytes
SHA-256: 617b652b641e1accc4487b7ffb654b38b258b740c2df520eb8b6ea1d18ab4bbd
font_01_sfnt_off00005e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5E 19320 bytes
SHA-256: 4bc6a94d6bb85ef991d6155104b6c645d1c58d8d8f566ce4dbe4ddd2ec9b4351

Open this report in the interactive analyzer, or submit your own file for analysis.