Malicious PDF — malware analysis report

Static analysis result for SHA-256 1063fee70d48acfe…

MALICIOUS

PDF

82.0 KB Created: 2021-09-13 14:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 70391fae7b917634f03e50dd61407e4f SHA-1: 54dc793b702577d835734b8699f661638f807df9 SHA-256: 1063fee70d48acfe21abf2847fb836747ce9764a2821f65d0b0952c7fcfe2942
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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 https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/gapetepawalisutem.pdf In PDF document text
    • http://al-bandak.com/userfiles/file/49255459839.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/zixelukubajadekumepi.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/64825221111.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/pizufofoxanewulenuvo.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/63903156323.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/94273905173.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/fodipazuvejorodofeko.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/16704861269.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/16236944206.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/nasifezarejom.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-11/20210911205452290319.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/46601077457.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/zemepubobotad.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/levalaxajefo.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/51613732470.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/pizuvofuwi.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/84807859286.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/betigejuxavafolufe.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/57o2fchqnmua9kcs824jq1071n/28135221689.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/c86aca5cf3ddeb2dc310d393226893e5/48713523932.pdfIn PDF document text
    • http://torby.kbo.pl/ckfinder/userfiles/files/82143034281.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=send+notification+from+pc+to+androidPDF 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_off0000da1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1D 10640 bytes
SHA-256: 02fe7234a62ecb6a0c5d98c9fff2a292063f999be10efbd015b0c03df41d9751
font_01_sfnt_off0000f278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF278 18404 bytes
SHA-256: 819b22e8246e2cd284e1b1a5458f9c01573169ba23d1efb67e3f1826b2ddebcb
font_02_sfnt_off000121fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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