Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2de185e4149efe…

MALICIOUS

PDF

71.4 KB Created: 2021-09-25 02:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6b4d2e2f61f84b02e7b8181e45311557 SHA-1: 74fcb9905eab380453047aefb8548730749deac7 SHA-256: dc2de185e4149efeb9f9a3fb1011e1530183c04c814668a0af35f6b7aa5a371a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as a link farm, a common tactic for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://www.mezmat.ru/ckfinder/userfiles/files/86956621719.pdf In PDF document text
    • http://thewesternmist.com/userfiles/file/wabunijipanelew.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/39153124136.pdfIn PDF document text
    • https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/81403789818.pdfIn PDF document text
    • http://tion.hu/upload/file/78969351376.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/zazit.pdfIn PDF document text
    • https://khoahoc.timviec365.com/picturesfiles/towomutaxo.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/nexesula.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/9865170149.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/lilosudek.pdfIn PDF document text
    • http://jszl-rolls.com/filespath/files/20210902191015.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/surowowetodo.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/c7db6750ed03df63cee3e66087ff63f8/xenidefujinusoferorepulis.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/zogifuzepukiwoxos.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/54883433449.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/74326466533.pdfIn PDF document text
    • https://kakakmanis.com/contents/files/lokovubomafitigederal.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/98951027093.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/56527130842.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/poxebatud.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/51649390658.pdfIn PDF document text
    • http://vikohasanfiber.com/upload/files/vegazomawomozag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=friends+reunion+torrent+magnetPDF 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_off0000aefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70F 18816 bytes
SHA-256: 9e542c82ce46d695f5bb66c0a7697b5072d330867faebce366a5f452ac76a01b
font_02_sfnt_off0000f837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 10620 bytes
SHA-256: 851d10b3e8fd4b723b65ca057fcffde3e81d0620adc680aa945523b91cb1c963

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