Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aaeb92d06564492…

MALICIOUS

PDF

89.2 KB Created: 2021-07-01 10:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: aad6dabbd8d7dcd3a4785e5b6a5e6ac4 SHA-1: d8d2bc142dc1ad38f56e6a4d8ba94ea7f723ca58 SHA-256: 4aaeb92d06564492ad75b2e0ff5c6e116a59fe5fcf0137604f2fb03621b83913
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and a significant number of external links, many of which are hosted on compromised or disposable domains. This suggests the PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://infrive.ru/uplcv?utm_term=pdf+to+word+with+adobe+pro PDF link annotation
    • http://palakkadtourism.in/ckfinder/userfiles/files/98187599685.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607712f95b547---jafeneruk.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/megutaxu.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609a27c59cc06---rusosigilinesakolepad.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/gebikibisominupok.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/dakidaranukezotobidojije.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/3a768b1e98bf5b8c580dceadfcf3ac88/60180261409.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e29a0ac1a6---53325323449.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/4e80c1076665b9ab17593c1b7ab726c9/taxunusetiripasidov.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/gafevoxevuxim.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ktn9m51leeg6tt08idr6usfloa/57214207479.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/66892570788.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/tusulasasujutodo.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093aadd65dfa---dudilejojisepo.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/47679e89773dc0a206e55ce8d662bb01/18380694580.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/iubr7s01sgbhlj2st07mvpdou1/xiwotufujebimo.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bfa331f94---32313510587.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/wofofiw.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad333eb706---bokapebaripujomowuzudolat.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/167ea46795552e38b7f6e44d03c46eb1/vumumari.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/71327301315.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/60c543895b0ee9f764ce097f7c2dc4fc/lozaxumusuwaluzedu.pdfIn PDF document text
    • http://roocenter.ru/upload/file/kofodenu.pdfIn PDF document text
    • 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_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 10504 bytes
SHA-256: ad82bad327c05c3e3bf3b8e6b07592ec56bc02ac782eb72aa12365c01bcebf75
font_01_sfnt_off000113b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B3 16808 bytes
SHA-256: 92c1e1f1984c5383fadbaa4107f9da86aa0ac14ae7183bb1dd9e5e98210eb158
font_02_sfnt_off00013f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1