Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e31e50e8e1d0ad…

MALICIOUS

PDF

69.9 KB Created: 2021-10-03 22:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 105ae7a0ddc4e00749dc0bc60a703039 SHA-1: aee8d2638a1ae2767affac46b3a5dbe3d0ea6cf0 SHA-256: 02e31e50e8e1d0ad7c123e099c8774401a808398e10c1f14649a3065feafdd31
134 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The JavaScript likely redirects to one of the numerous unknown URLs found within the document, which are probably used to host further stages of the attack or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://lifo-sea.com/ckfinder/userfiles/files/zavefopaxuk.pdf In PDF document text
    • https://pezenasenchantee.fr/userfiles/file/togutozamalojew.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/sonivuvikevonikujoriwo.pdfIn PDF document text
    • http://kco.su/userfiles/file/33197870625.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/xarekegapugepetido.pdfIn PDF document text
    • http://decentlogistics.pk/survey/userfiles/files/70605273030.pdfIn PDF document text
    • https://angkagenap.com/contents/files/xerojemivapisituxekaves.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/6705004363.pdfIn PDF document text
    • https://beleznayauto.hu/galeria/pictures/19036686640.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/zatudutit.pdfIn PDF document text
    • https://service-panev.com/userfiles/4020832901.pdfIn PDF document text
    • https://franciscojaviermoreno.com/DocsCKeditor/files/sizavonurebatives.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/jajime.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/6f3b08b722f39b86680a8548e8865478/65551520915.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/5054918297.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f28ddce27---pilif.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/dobitopuzod.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/15888321679.pdfIn PDF document text
    • http://zhongyuemedia.com/filespath/files/20210920032417.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/59863149909.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/kuzitabijorokajososaxox.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/48458988493.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/gugerimatamup.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/76467941492.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=active+and+passive+voice+quiz+with+answers+pdfPDF 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_off0000af83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF83 15900 bytes
SHA-256: 384d4f1335d6fe3061153948a97c2721f7d66018b12c156b69559097c254fc55
font_01_sfnt_off0000d7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A8 11108 bytes
SHA-256: ebb9050bb650193fbe64a60ae1b05d08f7a63ad54edd3447a7f09757505294d1
font_02_sfnt_off0000f17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1