Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc653993a66eeae…

MALICIOUS

PDF

72.4 KB Created: 2021-09-06 00:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 67ddd9c229da9a4e326acdc24e68fd3b SHA-1: 88633d871adeb85e0af7920247a639b4835e9b6e SHA-256: 5bc653993a66eeae888a656b09e22bf186272e2a794c49f7cb0cec9d1104457c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pixomot.ru/uplcv?utm_term=caballo+de+troya+jj+benitez+pdf PDF link annotation
    • http://cathugo.de/res/wysiwyg/file/saximunodezegagasatupa.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/n11kuqv2pa78591injr4fg6t41/42705786467.pdfIn PDF document text
    • http://yanartextil.com/firma/files/9053905823.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/vixusijeba.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/zuguzefedafodimakejurulat.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/m1djtk193qa3bt02env9rpbbg3/21202458502.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ea7309b1a---wobinupezavu.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/50497173044.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/vaputezudebijajamukatolat.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/venodidorisineke.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/vv80ciqmldpkslm8di3umdm847/13456099046.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/54345413862.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/tojijusasekivu.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/numatavelinapotezejavone.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/97390569347.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/8f82463e40c74957d5bc0bfbf3421487/teroruxuladufi.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/6s9isu8t34oob1qr167ben6v40/fadosuvivinawozeve.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/23608609666.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160fa1f49ebbd4---8993096269.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/73273543038.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/44802878076.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/4ee74c326835f79ef495a7b9fe465625/jasemobuwerivolerute.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/sorujexupogulomebisesox.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_off0000b745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB745 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5C 10800 bytes
SHA-256: cd8e1aaad8b1cd791603ff2504ff3c0937ea40a1e082a574afe1f34dda61c841
font_02_sfnt_off0000e825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE825 17280 bytes
SHA-256: 5b8fea92919b1cd6cfc0b510e133142f468f30605461ea0896659f7546565112

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