Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0291944ef191b7…

MALICIOUS

PDF

35.4 KB Created: 2021-07-08 07:54:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0efacbca20d60aa4d41315d24b8008e9 SHA-1: 08dd1318333a0d928043aa4ef9484c7ff7517e30 SHA-256: 5e0291944ef191b7208f4c7c8a17f57ececbfeb0e0554a2c02b725c4b1948b84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to a known malicious redirector URL. This suggests an attempt to lead users to a malicious site, likely for further exploitation or credential harvesting. No scripts were extracted, but the embedded URL is the primary indicator 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.tw/app/431946152/free-robux-no-human-verification-or-survey-or-download-game-hack In PDF document text
    • https://www.kaojen.com.tw/upload/files/argent-infinie-lumber-tycoon-cheat-roblox-engine_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/a-hack-to-steal-robux_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/get-anything-free-on-roblox_GM431946152.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/how-to-get-free-clothes-on-roblox-2021-on-phone_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/roblox-counter-blox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-roblox-cad-code_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-synapse-x-roblox_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/the-free-giveaway-obby-roblox_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/roblox-hack-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/roblox-hack-com_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
font_00_sfnt_off00002f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F01 22808 bytes
SHA-256: 156d0fb9dae850ea3055ac8083d027c8871d4bec84c866bcc0a2c730bbbb8fb5
font_01_sfnt_off000061f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F4 20208 bytes
SHA-256: 76b0661ef1631e3ff5be93da9b7a1da7a58595af6d3396f266def641a9cc9522

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