Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a26c11a27e92086…

MALICIOUS

PDF

36.4 KB Created: 2021-06-25 06:39:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: eea6cbc7f5e84228526ee33992ed5e09 SHA-1: 923d51a6bac11ad3104c4b1768e4755a17ab7c3d SHA-256: 3a26c11a27e92086606b4f5057638fa7f1d7b2499b5391b03ecad740b6b73f56
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized PDFs related to game exploits and in-game currency. The primary URL, http://netcdn.co/app/431946152/free-roblox-exploit-2021-game-hack, suggests a lure for downloading malicious software. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-roblox-exploit-2021-game-hack PDF link annotation
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/hydra-roblox-free-robux-obby_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/pubg-uc-indonesia_GM1330123889.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/free-robux-lebansay_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/how-to-get-free-premium-roblox_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_off00003606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3606 22344 bytes
SHA-256: 02424749935c9aef9c2dcc214f47949323679e741846c911fcf0f1b3810c3060
font_01_sfnt_off000067ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67ED 19452 bytes
SHA-256: ae114c9a8e9216a73ec53f2de3fcf98c19cd1bb4b398288a927e29261ed4a168

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