Malicious PDF — malware analysis report

Static analysis result for SHA-256 1734266cf26a2c50…

MALICIOUS

PDF

149.8 KB Created: 2021-06-25 17:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 6de025d8d142daad3b9ec607ae6b0f04 SHA-1: dc18a2c946ed956c2546ff167747651c6f8298e8 SHA-256: 1734266cf26a2c50d5dcd779ba224e4adc38485dcce75ae413024e095cc177be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve to redirect users to phishing pages or download further malicious payloads, aligning with the characteristics of a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9739

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://krisoc.ru/uplcv?utm_term=69+meaning+in+cantonese PDF link annotation
    • http://retco.ge/ckfinder/userfiles/files/vefexoda.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ddjgpfd92mksb4a14diocfle18/gujidozesil.pdfIn PDF document text
    • https://afayl.com/userfiles/file/11189890094.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/wakufebuwijugenebarorajow.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/08e30677976db089adad32cc6f7a52df/45658265955.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/2c8708ffb24e76ea366d4a55cbc2de59/bugowefaxo.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16086bd1e48859---47390959581.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090937b42404---89299039656.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/ac44q4hac3013e3gaj4i7ugj0r/kelesij.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16089d9b33a0d9---84900195402.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/267406648115cff7fa828c3a62c731fe/89120291717.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a408d2607---98293880049.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607078eb2f17a---kujopifuxetelibotepur.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084b096c05a3---likofomadazokokozageka.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/cd1d0a82d0be8c90c6916e1d7a6fa356/ragutagilolesokopigozav.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/minodojosu.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57386624928.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d26aa39e69---9363240910.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2dde245b0---kopubisibugufekuk.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/0f615f6d38724bfafcc4c427dffdccf6/bepuxesenorux.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/texuwopeza.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd6bae211c---50695439827.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8d494f8ec---pirem.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000192ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192AC 10668 bytes
SHA-256: e9700d43f9c310b99676410e2b6cb484a218960843a98872f166ee6a7da8622f
font_01_sfnt_off0001ab12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C320 31544 bytes
SHA-256: abbf684028f93444f7b6e68b8e7aea36566c9c6b964f081e4b7cb156fdade7b1
font_03_sfnt_off000216c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216C0 20448 bytes
SHA-256: 4702aef5f7e25d86c20b5a9a728e913b8838aeef03239dcb1a9b84045435080a

Open this report in the interactive analyzer, or submit your own file for analysis.