Malicious PDF — malware analysis report

Static analysis result for SHA-256 619482c2e0b290b3…

MALICIOUS

PDF

76.6 KB Created: 2021-08-08 11:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1828f73a4e5d5c865b68c2c237914158 SHA-1: 5b740e2bd781895287c9edee4a6982d84dd880e6 SHA-256: 619482c2e0b290b3aecc67083be007f739bd142a256fe8bd5c2683f574b5d241
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to redirect users to phishing pages or download further malware. The document body is heavily obfuscated and unreadable, suggesting it's designed to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://inwebjor.ru/uplcv?utm_term=chocolate+box+design+templates PDF link annotation
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/9505ad5b42bb263f598d89259d6cbad4/61561084878.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/tozurexawiwalujidudejub.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/c30c9dc2b6f0110b46f9c91c0f7d0752/lesamavugodujonarafax.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/7f9096535ab2ff235bf9285f993f52e8/kesufizosarez.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/jazifadizoxadevas.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608110b94bff0---povezulojobe.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/senawanibe.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766af43d01d---sibosakonixopanuza.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/18186867669.pdfIn PDF document text
    • https://ancoraeducacion.com/images/sumajatavixidetatafo.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/07922d2f31e3c63af2183dbd7da3b2d7/xuxuloxupulidikazavoje.pdfIn PDF document text
    • http://phongkhamducphuc.net/images/files/batajomunota.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/832141599.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a391cf1a977---puredetefevexakusevov.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/b9ed2214783112834bd5108d063475d8/8046871447.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/75222658523.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/43647051992.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/jalapubopupomeradufo.pdfIn PDF document text
    • http://gloria-eurex.com/zaxeboribefe.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/efc58a74f163cdf8e63df6e5d959e5bc/fusafotifisadurubo.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/93142285820.pdfIn PDF document text
    • http://hydrem.ru/images/file/95261618552.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/18947847458.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/fupegurufuvu.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/58043773596.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_off0000c8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10D 15884 bytes
SHA-256: 6fbdd194b2975b60090f74f325101552049a731e2f15f7e942909463e456ed65
font_02_sfnt_off00010a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A18 11132 bytes
SHA-256: 974da1344b7f7e9f7979cb48746b031e158bd9190736baf46ad28df7cb299b2f

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