Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b602cd0efb2546…

MALICIOUS

PDF

94.6 KB Created: 2021-07-28 04:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: aa9bd3fd2c2712c4ae0a302cd1d93308 SHA-1: 1512c8a43b840afcdb5c159fd04d4dfc65367d2d SHA-256: c2b602cd0efb25467685d948777b753ab28d94e6227331f1c8fde7a1886554fe
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body was unreadable, but the overall structure and URL analysis strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://ukrainski-rosyjski.pl/userfiles/file/83750774151.pdf In PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/028bfe0d8e7d1ddb593fd9e6b664850f/2581616492.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/c5d70b7e9d655abaa8c9526c7013180a/91548019537.pdfIn PDF document text
    • http://kudusde.org/resimler/files/53984787648.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609044f792f68---valobonuzifa.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f89b82b005---43450166373.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/maxidijufefafofigoparone.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/cc8o45ta461ofhq3lksc9d5v14/nofusifozake.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/biforujifaseredu.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/komavevikovuzajejutej.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608eda2b84434---64578924381.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/51903198398.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/f94bef115cac7f4a54282e8ce1f7ca0e/fomuwojiragujiw.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/3e6pd37k8gvaafagesbrqfal9h/tarotog.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/nifirofelozezafot.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db21d6af7f---18738034879.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d89236ca2fc---fukajagaben.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/molawakonel.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a267b00dbaf---69276077464.pdfIn PDF document text
    • https://kaisar168.com/contents//files/48826206743.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/39080303074.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/85a0e7fde3b5aa96d27b5b6f6d30feb2/fonexag.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/lugezitunipukolesuzatel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=where+is+navy+dive+schoolPDF 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_off00011099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11099 10544 bytes
SHA-256: c630c2ebc6df3e906846ecb3983763edc9a2f93e3051f207e094d008e7dd51f5
font_01_sfnt_off00012899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12899 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000140ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AB 17044 bytes
SHA-256: 9a506888413d6e83f3cdecdd5c5cf1a23ac762f60b3146341987029b2ecaf12a

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