Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d3ddc92d37076e…

MALICIOUS

PDF

69.9 KB Created: 2021-09-28 22:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 68a0183caf11bb1d118ffefff159e756 SHA-1: e8cb5506871b69323f876241f841fa0356145aba SHA-256: 01d3ddc92d37076ea4f05d609c8935908fcfd38f5e541f6eb02c64c3e17e37d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://synerhu.ru/uplcv?utm_term=29+card+game+apk+download PDF link annotation
    • http://tungalag.mn/userfiles/files/12860919820.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/5n62718tcqkqkhvcko6gcipdbd/33090272379.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/0e578b83e0ecceb50775566e0d4c88ad/zexezubupexupifekuxuwirok.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/4efccc719ed4d81eaaabb36ce7adaeb6/44914743502.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/91332993010.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/82208020985.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16130ad6cf401f---1475437105.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/tabexowupoporakabufetivu.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/34502750193.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/27315561187.pdfIn PDF document text
    • http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/gulivogujefox.pdfIn PDF document text
    • http://schubert-hh.de/image/file/gowodoxipezifa.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/13713994582.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/92186159439.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/28449277299.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f5974f4019---wutot.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/30236660818.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/51290939481.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/29707717238.pdfIn PDF document text
    • http://citty.org/images/uploads/file/95497992461.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/8907369122.pdfIn PDF document text
    • https://bacsionline.net/userfiles/file/69694864293.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615070d78f5ce---tapaporikagodi.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/logevenikilimed.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_off0000b278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB278 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8A 15256 bytes
SHA-256: c127a1ef924a0c287b5b099b3e5d1af30f428f04f15faf7ecc79a4d990d8bb26
font_02_sfnt_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 10868 bytes
SHA-256: 76dcf2d282f9e306bab7c3fedb74f0222107551eb825b1b833080e5b67608a6f

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