Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2057781774eea4a…

MALICIOUS

PDF

87.3 KB Created: 2021-09-02 00:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9f4534ea0f345d0f4b265a765195bc71 SHA-1: 552b954384d4de879d567a8032f5eb3a30572114 SHA-256: f2057781774eea4a3f67afbb578243194c41b0c6da896ef922a52f76aa83567e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to lure users to malicious content. The presence of numerous unknown URLs hosted on disposable domains further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df8385ad463---77339502538.pdf In PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/47402886960.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/mowiduwanijapamure.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/kunesig.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/bexisowogepaguzoxe.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/aojooka1gcvot134odigdibnnu/zizibiladigogitozemag.pdfIn PDF document text
    • http://www.celso.org/download/35460868051.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/32343657843.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8deb7b730e---nupazexugumomazuju.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a45ad0103c5---kegabo.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/rekumaneba.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/82011508804.pdfIn PDF document text
    • https://rotherelectric.com/files/zadek.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/37810212382.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/29633221440.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/39091705931.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/50240115186.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/24866213428.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/mavoxiwipejuzomafofen.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5d34e0020---56321691321.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ob6rdm6o1q3s2uivla8hr15sb7/13721413186.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/pagofozivusikik.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc2373d40fb---68018944917.pdfIn PDF document text
    • http://honda-vo.com/upload/file/92132822045.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/423febe9d5231a91ee27c092aac3b2ac/37721219049.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=volvo+t5+manualPDF 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_off0000ed63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10575 18960 bytes
SHA-256: 312ddb4a947b69e103e16ffefe546d8334cc429c553bc19bb361bfeb0caa57ce
font_02_sfnt_off000137ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CA 10048 bytes
SHA-256: 747131c2ec5e94f43581b39903c2fd0a9da1b598f82f0dab4ad17f966236d87e