Malicious PDF — malware analysis report

Static analysis result for SHA-256 418c08ee1865f715…

MALICIOUS

PDF

83.2 KB Created: 2021-10-04 13:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ec1dfdbc48afced1dd1ca4b50fbf8f00 SHA-1: 26e4a491797d55c0b76ee94718ecd4fa56cab5c5 SHA-256: 418c08ee1865f715600d57963ae32ae337acb5ea33d2bd0311cb1ec7c783c586
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one heuristic identifying it as a link farm on disposable hosting. ClamAV and an ML classifier flagged the PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious websites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/ng418clgpra8aqlhuvf8gv2mt7/31737536218.pdf In PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/godalizemijimawomuxujiv.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/venegotomavalidez.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/57471590998.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/62407846609.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/74605871502.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/79418224292.pdfIn PDF document text
    • http://quaint-house.com/images/blog/file/rajofojofofolig.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/46881750312.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210924235219_mc84vj.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/2196178233.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/97150393505.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1615ad55363879---45956661318.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/72372052325.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/51338398074.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/37054012255.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/30287240821.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/46909722825.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/77776514624.pdfIn PDF document text
    • http://partnercable.hu/files/wufoguzuzigaxaxumamol.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/guxumoxefupajixijapidejan.pdfIn PDF document text
    • http://fkhd.cz/data/img/80193786459.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/52438108818.pdfIn PDF document text
    • http://orthopediedelft.eu/files/xajujom.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/zovirenege.pdfIn PDF document text
    • http://tao-ssct.org/data/upload/file/mukuxuviz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=wheezy+lung+soundsPDF 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_off0000dff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF5 18504 bytes
SHA-256: a102875726beb4347afcffa461b02185d9d38175aff51a26d113d0519ed4297c
font_01_sfnt_off00011062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11062 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12879 10344 bytes
SHA-256: 6adfeba4f351a3d235189d1274cedb09946d604d77c32c7813ab43d9d4bb9fc0

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