Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3ea0469595ac99…

MALICIOUS

PDF

80.9 KB Created: 2021-07-16 08:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c6b860e657d474a1a00efba7fcaedc2f SHA-1: 4617cd1c31ec5b495963731ff3781cdc695dec64 SHA-256: be3ea0469595ac993019b05ede98a00c533a44607ddc303ad44c011344bf56d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, directing users to numerous websites, many of which are hosted on compromised CMS platforms. These links are likely intended to facilitate phishing attacks or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • 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://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ac11bfc6685---kazopebefaxetonirote.pdf In PDF document text
    • http://groupkaishan.com/d/files/sesekelamowoliwen.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e69822bf7---81197875370.pdfIn PDF document text
    • https://pisangmanis.com/contents//files/79040088793.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/aecd3760a75e638e53a99f4bf3ce20cf/21000359524.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/gesufuxutozunivizula.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4c4258870---tirolosaduk.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/95878086236.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/44195138445.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948903954e2---15616723705.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ed5362458---kajomelazorakuwesilalosud.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/wikupekemiz.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/50066203732.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/4ec98d205d97f6cdb660520c6a0af882/jigobipuzafelaje.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/81678736467.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/pumimemuguzefiresiwa.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/dc45b03d47c9cd201d7a1dbe0ed5f27e/gelapofadubeb.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/litaratipefab.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/eibmkde9kvno6qlrkrebhk5n8v/14784184072.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789106e0d90---rewiposesezegepabi.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/pufavebubeponuvevob.pdfIn PDF document text
    • http://otczenacts.com/media/files/nimitojabemosiwekupenuraw.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/8660396650.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/sitikazofidovafe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=conjugate+the+verb+to+eat+in+frenchPDF 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_off0000d8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 10868 bytes
SHA-256: 79c2e368fc26a1068cc2917e16af0f36d411d0e60777f084c724b69361d73d1c
font_02_sfnt_off000109eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EB 17580 bytes
SHA-256: a24b9979020c1902859c0a58a7a920d629127b0932a54317a365557a1adb59d7