Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0d9b34d07f8ebd…

MALICIOUS

PDF

85.6 KB Created: 2021-09-18 00:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 49d40352af77bf489aae5c91d27b356d SHA-1: d4030196edc494c24cd8dda9be66edb9555afe03 SHA-256: 0d0d9b34d07f8ebda137f90845bab23ef76aa478faed55de484072eeea538e21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://medvor.ru/uplcv?utm_term=how+to+restart+a+hanged+android+phone PDF link annotation
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161417a2cedc40---zikurun.pdfIn PDF document text
    • https://longhungphat.org/Images_upload/files/37874684346.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/161342b5b00f52---kuzujuzanosurabos.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f35ca25799---60697718408.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/duliwoziridevopat.pdfIn PDF document text
    • http://www.integra-cr.cz/administrace/ckfinder/userfiles/files/wogagun.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16138267ac1c0f---26622586025.pdfIn PDF document text
    • https://isleo.com/i_photos/file/winisifaw.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/47617661811.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/belum.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/28021818712.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/96572967076.pdfIn PDF document text
    • http://nathulaldasptti.com/ckeditor/ckfinder/userfiles/files/49028806622.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/zukif.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/widoxowisaxe.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/lumagijima.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/dofurudesenate.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/falozujiluxutupadi.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/56213731617.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161432fe235eee---foxixodibidiz.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/37002644592.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/talufasuxuxenufowetobevim.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/83066360646.pdfIn PDF document text
    • https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/95907916921.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_off0000e989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE989 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A0 10704 bytes
SHA-256: 9135b220a454308b1a6dc2139196abee15b168ec6caae1c153b43d21332b5b8d
font_02_sfnt_off000119f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F4 18064 bytes
SHA-256: c0778223457906488f507b00e99ee81ea228e9e40c5c8f5b2cc29b552f01c903

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