Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5f96627094350d…

MALICIOUS

PDF

83.1 KB Created: 2021-09-23 18:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9d3c5ce02b54dd65b2e2db357eaa53f8 SHA-1: 2a21910a441d69ce687713c4d701cf21eeda32bb SHA-256: 7f5f96627094350de0893ba774485641d82229170332e59987d5db828381be85
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream, which is a common technique for delivering malicious payloads or redirecting users to phishing sites. The presence of numerous links, many pointing to potentially compromised or disposable hosting, further supports this. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://abwvictory.com/uploads/files/notupoxuvepuxowagokapuwa.pdf In PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/detonomikinifadevizu.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/vuxovemeropebatikelari.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/rotugoxuxawewixinowumuba.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/sinudijifabine.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4htcecejovju9266r48g492pn7/bidiluwawimiwumos.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/18244419eb8e01d98eb7128edd725b47/zitamatizafimaloja.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/xogajewexebaxim.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/11786461833.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/693d1ad93cc1696bbd9cda4d0c47e2f8/penuxazibixamojorika.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613dedaa7c622---fefit.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/32811303762.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/fufodanuwumi.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/newumugepivebovumevipapab.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/62851075535.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/02/rejezilupategosinubava.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/80999233889.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae0469669f---zonebasirujaziverufefi.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/gisuwukawef.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f60c67c08---55623366955.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/fd2dbf5e715d3da15297268cafa5fe0f/koposonizoseboje.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/90526553919.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/74691646785.pdfIn PDF document text
    • https://pactforfamilies.org/ckfinder/userfiles/files/81019356624.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=jungle+book+heroPDF 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_off0000deb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB3 10188 bytes
SHA-256: a856facbe168a3aee8556daef476c6e4333941f8059e8710a329705eb05e83b6
font_01_sfnt_off0000f56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56F 19148 bytes
SHA-256: 8ff19cec3d078a70b8c5f211d42d4a717a306bde68c380b6dbebe2283381806f
font_02_sfnt_off000126cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1