Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39d9038d6a7e9f2…

MALICIOUS

PDF

105.0 KB Created: 2021-07-22 02:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c29067c4895bd612ba428be0eb6bdb5d SHA-1: fd3c1de5d005c93ec1bf82cdec8ae56a3ed8e6f8 SHA-256: e39d9038d6a7e9f26dcc6d9e621312d78009cc7bf2e257c37b8172b01cd21513
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress sites, which in turn host other PDF files. The presence of multiple links on potentially compromised infrastructure suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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 http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45bedbaa3e---11101492269.pdf In PDF document text
    • http://cga82.com/admin/File/sagepanagerurujeranike.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7420b292d---beneposuxibu.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcec65571f---vefumetigam.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/6cf7515e3afde1200c75992118e81e0d/96146767716.pdfIn PDF document text
    • http://dvarenda.ru/upload/file/sexuwovanafemabesoluwog.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/kogaroji.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd30100bb9---kovepefetukepovarek.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/847911b8ed3f2d7a21faed242c33026b/49212702435.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/b8e211284e79f2366c5dd4f24a2e5aac/98830354700.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/91492689154.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/18128774296.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1af07d1a60---texixexapigibafigusugev.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/xiwax.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/25758316649.pdfIn PDF document text
    • https://clove7.com/userfiles/file/13023294652.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a98c2f126d5---19026451198.pdfIn PDF document text
    • https://akvaguru.hu/user/file/botodu.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d3a2caa9---jizumuwusutepara.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bea56bb3bc5---46960449769.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/90217050745.pdfIn PDF document text
    • http://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/daxununorisoraridupixa.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca6c6a788c---1492721949.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+suicide+pact+bookPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001064f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E66 10656 bytes
SHA-256: 7d973417a04e8160e815128e0575ced867f0c42d83b16489c29026d82a478817
font_02_sfnt_off000136b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B9 3136 bytes
SHA-256: 5608f648bb0edd346dfa6420119c16d0e5ddb3834a73c16bec88ec0e7995bc5b
font_03_sfnt_off0001439d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1439D 21392 bytes
SHA-256: 345b04ae7b305b07129a217e44e8f9bdc5e61747cbc77a902780de11d4c2616c
font_04_sfnt_off0001795c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1795C 17172 bytes
SHA-256: d8457b382820a1a43c1f5edbd4ab1ef614fff27fcd2cab2ca0490ceaaecfbe4e

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