Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2072b2ac197567b…

MALICIOUS

PDF

74.5 KB Created: 2021-09-11 15:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c07b15a7005973f5deb1807ab2fe8e97 SHA-1: cb28ef12a2700463b3cd86bf5155f382fd805837 SHA-256: e2072b2ac197567bbec552d9f8789596c4251bf690f1a0ad272896152cc480d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or are part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://okazdedziecko.pl/_files/Media/file/77403846095.pdf In PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/67988125209.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/venupas.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///20210910132633_385078324.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/84253355172.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/4278463671.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad2a6e954b---rovupusebowadezen.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder/userfiles/files/renonadugebotep.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/zolepajobux.pdfIn PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/9912348631.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/tuwetigijujoviwinutu.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/11f9eb8fb113990a1c05b070f6187d14/68100413893.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/7651543415.pdfIn PDF document text
    • http://kccmaul.com/files/files/pimij.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/69447122006.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/78014496997.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/b40999e944a4e0ab419d0ac987ade2e2/repokotefos.pdfIn PDF document text
    • https://moiatakashta.com/userfiles/file/40888842963.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/vesusigatig.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/74012580598.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/21162666057.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342b6954c28---48257002354.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/xejoduxurop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=ugoos+am6+pro+reviewPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA2 17772 bytes
SHA-256: f8557c3ba0295c0449b433e7ee772d028f1f5b2801bc528675a89212bf8f4ed1
font_01_sfnt_off0000ec2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10445 10672 bytes
SHA-256: 0843636dc1647bb8904aba6347105f60230a31fd394dcfed4cc21af2de19fa17