Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fafe2caf800b69c…

MALICIOUS

PDF

95.0 KB Created: 2021-07-03 18:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0385c0584bc3c201c93937052e8210d6 SHA-1: 1bf4f9f3eeda92b1832d1335af6ed1a53dc121be SHA-256: 1fafe2caf800b69cbbc4783dadb20fe2e0fadf898088c93da913f0e938d9c19e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs, including a link farm pointing to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious sites. The file's structure and embedded links indicate it is likely part of a phishing campaign or a distribution mechanism for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://inwebjor.ru/uplcv?utm_term=physical+geology+textbook+pdf PDF link annotation
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b708745fe9c---puxoxojikozonuzigisof.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/s3jejdt2m5k562i7bd1bcechc5/sufupejatolima.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/74246091177.pdfIn PDF document text
    • http://ibb-online.ru/f/file/52845314233.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbb63efdfd---71427382843.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5b9915c02---wiwekekedopepupisuni.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/rufekosezoligezaker.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bc8247ad7acb51a25c7e492795d6b2b8/rivewuwozuf.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a802a3396ea---62994816246.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/14060729487.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/pql325b7nlem25qg6u32fcv7mb/zozofoso.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/kogivaj.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160b602ee6c07c---20513788679.pdfIn PDF document text
    • http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/79984253637.pdfIn PDF document text
    • http://wurbs-hanau.de/userfiles/file/23055413772.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/f6590390cbecb590cfd734206a4db8d8/82501365120.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a7155b92d---38634754216.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de395e95b2---3757508146.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b99db286e---16901754998.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074164163f18---nenonubajipab.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-06-05/images/files/lotid.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094928128815---nadogojezexaporudonax.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b997557c2---62817433942.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/9d198d0416dd99979b662f03d9d7fac0/tuzigimuvifofonakesamir.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/684c1bca4296bccf99f1021028192497/lewigigagutojigozewumaz.pdfIn PDF document text
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/lasajanejonir.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ba905dd7d---xakipejepesavakit.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_off00011093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11093 16928 bytes
SHA-256: 8271e7e121db3d7e5fe112140a462944c351fc967acf281c334eee395667302c
font_01_sfnt_off00013c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C99 11144 bytes
SHA-256: ddcaea770c9e4b0404e34a60a2abb90994f271dc4638fd6d810d34609e699e93
font_02_sfnt_off0001566d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1566D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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