Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c5ca7ce65e76b1…

MALICIOUS

PDF

77.4 KB Created: 2021-09-19 21:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cac472222ab08557efb47e27cc12faa4 SHA-1: 7226baa43fe256e2c1d6511bda3380bcc0b009d0 SHA-256: 96c5ca7ce65e76b1da5d92c3679998c905f6cced51087a1e2e8fb813f03c82c9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a large number of embedded URLs, many of which point to disposable hosting and are likely used for phishing or distributing further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://medvor.ru/uplcv?utm_term=keyboard+shortcut+move+tabs+chrome
    • https://jakspravnenapsa.cz/userfiles/file/18599253535.pdf
    • http://orenprom.com/img/account/file/zitazubakuxure.pdf
    • https://locktactyuma.com/ckfinder/userfiles/files/dolajubudevata.pdf
    • https://ceiling.holcom.vn/webroot/img/files/bivosilobubeladibutovozaw.pdf
    • http://newgrids.com/userfiles/file/48373922812.pdf
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/94493971071.pdf
    • http://uptownherndon.com/uploads/files/42728856717.pdf
    • http://superfishinglewood.com/uploads/files/kifuwetubaf.pdf
    • http://basaritarim.net/admin/editor_resim/file/41253930652.pdf
    • http://poetische-malerei.de/web/editor/files/40259782673.pdf
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/nafavasikirizodebi.pdf
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/21107368707.pdf
    • http://lagunaapartman.hu/images/user/file/fizonenizi.pdf
    • http://maidichike.com/upload/files/36296332956.pdf
    • http://daltan.hu/userfiles/file/75961951469.pdf
    • http://leaders-adv.net/userfiles/file/12701980680.pdf
    • http://hidropro.hu/upload/85105738118.pdf
    • http://paitoonbox.com/userfiles/files/66921975308.pdf
    • http://queenart.kr/userData/board/file/5518604161.pdf
    • https://getracemirates.com/userfiles/files/15203261154.pdf
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/22190565972.pdf
    • http://haenuri.net/ckupload/files/14688238409.pdf
    • http://cosyromania.com/media/file/nugivokurukigorita.pdf
    • https://hasekei.jp/userfiles/file/mizakas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EC 16792 bytes
font_01_sfnt_off0000e0fe.bin
306c73d3807e4382c1aa388e6b83f4641bc7d341372450a338e97d919a5020d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FE 17524 bytes
font_02_sfnt_off00010e61.bin
9492f51ecc3b109f0a5c3819617d4766a7e20bfe486f739a82e3e9699ff77b11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 10804 bytes

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