Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 38d9d16baa997f7c…

MALICIOUS

PDF / .VIR

649.9 KB Created: 2024-04-02 07:51:16 Authoring application: Pdftk First seen: 2024-07-14
MD5: 91d1acb8eef67d1ba95ef6278c25b927 SHA-1: 6c936712c162a3791fe18dfcc42d76123e263a7b SHA-256: 38d9d16baa997f7c59d424f0758822ecb1a667dd67dc8c3a24771503049ef1a9
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8120

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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://www.eiken-cbt.jp/eikenjr/guest/redirect?next=https://uploads-ssl.webflow.com/66003888685e4750b31198c6/6632fb56d73fc16195a0986a_23201793170.pdf In PDF document text
    • https://w3.interforcecms.nl/m_Mailingen/Klik.asp?m=2091&cid=558216&url=https://assets.website-files.com/65dcb0216db9940bbada4d05/6632f80f52ce7792b4662087_61780592326.pdfIn PDF document text
    • http://www.ad.siemens.isoftstone.com/service/EventTracking/EmailLinkTracking.aspx?LinkId=d9705a5c-77c7-4192-a947-eb07d91ba742&RedirectUrl=https://uploads-ssl.webflow.com/660002b0baf6f29ff2c07fab/6632f2989ca2c0eb3f3775bb_62614446463.pdf&loginID=Z002X3JP&srno=1-5350885759&sendtime=2018-10-11%2010:37:27&P=1In PDF document text
    • https://www.shadr.info/lnk/?site=https://assets.website-files.com/65e87db05d5efbd20f166636/6632f9ce36519ca8af8ddfc0_badunisupake.pdf&dir=catalog&id=445In PDF document text
    • http://www.visitoruk.com/countclick.php?id=28327&link=https://iconicwinejapan.com/cfide/scripts/ajax/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://jefadi.gfxtoolkit.com/f/29522In PDF document text
    • https://www.awesomeburner.com/go.php?url=https://artful-design.stanford.edu/sites/all/modules/fckeditor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://duragofodevurin.gmcalaya.com/f/643394940In PDF document text
    • http://www.edoshitamachi.com/slider/inner/linkc.cgi?url=https://ohiotech.edu/sites/all/libraries/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://wujimirado.gfxtoolkit.com/f/95482&file=touyounoikenbiIn PDF document text
    • https://gaestezimmer-mueller.de/tracker.php?url=https://5.imimg.com/data5/SELLER/Doc/2024/5/415187915/PW/FB/YD/221250824/nuvimarulemiwisoz.pdf&id=2400In PDF document text
    • http://anti-kapitalismus.org/sites/all/modules/pubdlcnt/pubdlcnt.php?file=https://assets.website-files.com/660032c0e641966f9e5b6549/6632f302447b711248f071b8_totilavefiseb.pdfIn PDF document text
    • https://www.hmynewswire.co/home/click?uc=17700101&ap=&source=&uid=9f71cb06-a6d8-4d57-9a5d-54ae94a2ee5f&i_id=&cid=&url=https://uploads-ssl.webflow.com/65efffe8d4e10d26910f0543/6632ec9aecd837ce9d5abb65_57297122271.pdf&value=toolbar_abc_liveIn PDF document text
    • https://www.winemakers.us/1PbRedirectOrder.tmpl?RdrctType=Online&thisWineIDX=16028431489942&RdrctTo=https://www.colin.edu/cfide/scripts/ajax/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://luxowameb.palsaikbbq.com/f/78301In PDF document text
    • https://www.kinkyliterature.com/axds.php?action=click&id=&url=https://signups.med.nyu.edu/sites/all/modules/fckeditor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://toxesodetirexok.club-directory.com/f/3637In PDF document text
    • https://jivulaxinap.ragaz.co.za/12809300430147698354328646?naletupeneginizukupujujozenilewoninigewoxetap=sojawubizilubosiwapujejuwivenodidodoragovelasakevurobamosejokurajufalivakanafidinurogutofapokopudonaxuxalusosijunegusabusivegoxevibapalekegobodekiliboninoxofatusasuninokazinagejowelexisoxilojazixisipez&utm_term=crown+apple+special+edition&koziwunenegawibedezavizamisakidoxanebuzivedekinagopavonawizixarebuxuvezup=zibenowepafevobojobevamedavelituwowapaduluxubevaradatifagudozokosutekufusoselegipuzovonagodawaluxomosoxexumoritadokupojejafIn PDF document text
    • https://jivulaxinap.ragaz.co.za/12809300430147698354328646?naletupeneginizukupujujozenilewoninigewoxetap=sojawubizilubosiwapujejuwivenodidodoragovelasakevurobamosejokurajufalivakanafidinurogutofapokopudonaxuxalusosijunegusabusivegoxevibapalekegobodekiliboninoxofatusasuninokazinagejowelexisoxilojazixPDF link annotation
    • https://jivulaxinap.ragaz.co.za/12809300430147698354328646?naletupeneginizukupujujozenilewoninigewoxetap=sojawubizilubosiwapujejuwivenodidodoragovelasakevurobamosejokurajufalivakanafidinurogutofapokopudonaxuxalusosijunegusabusivegoxevibapalekegobodekiliboninoxofatusasuninokazinagejowelexisoxilojazixisipez&utm_term=crown+apple+special+edition&koziwunenegawibedezavizamisakidoxanebuzivedekinagopavonawizixarebuxuvezup=zibenowepafevobojobevamedavelituwowapaduluxubevaradatifagudozokosutekufusoselegipuPDF 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 extracted file (font_00_sfnt_off0009bcba.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0009bcba.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0009bcba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCBA 17528 bytes
SHA-256: 22bd6fa7954c6955d143e1bd03d642b77e3e6781cc46aae8e271ac23a0fa6cc3
font_01_sfnt_off0009ea8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA8A 17300 bytes
SHA-256: c3853de79b5676fbeb001733f3af251cf8ad3b4d4890b313dc588f5a507b4d77