Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e9c098f3b9eeff…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 06:09:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4f222c0b748090874bbde39372ab8e1e SHA-1: 0c42584dc71f1fdb887c16d2488dd685937959ed SHA-256: d2e9c098f3b9eeff8876df426163564f386a27740da6d68ff21c9511f090166a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO spamming technique. The ML classifier also flagged this PDF as malicious. The presence of a "download button" lure further suggests an attempt to trick users into navigating these links, which likely host malicious content or lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/roblox-promo-codes-for-free-robux-game-hack PDF link annotation
    • http://artion.biz/images/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://artion.biz/images/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://artion.biz/images/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/free-spins-coin-master-blogspot_GM406889139.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
stream_003_off0000485f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x485F 24708 bytes
SHA-256: f127c627708aec205ce57910b9bede698010be70ba049bffa94f88364a6b7ad9
font_01_sfnt_off00008107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8107 18676 bytes
SHA-256: 3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f