Malicious PDF — malware analysis report

Static analysis result for SHA-256 6761fc33db0a612e…

MALICIOUS

PDF

76.0 KB Created: 2021-07-02 15:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 03baa812a1b585f0edeb26ab506755a2 SHA-1: 2535c6b55388325113df29ec4bc0b352577063f8 SHA-256: 6761fc33db0a612ee403fc417a7f5dc57d370501a0baf2d50668289a31e6596b
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a large number of links, many pointing to compromised WordPress sites and disposable domains, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://educationexplosion.com/clients/a/aa/aae59ec6301d25964842a0067e0ae100/File/6961069270.pdf In PDF document text
    • http://beergolfers.com./blog/images/file/9460417820.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608710e35472b---ziwukejoxu.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/gorajotozopokifazirimum.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/phtv133ercrccbivepn1fgcsp2/vitav.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/mizabutofuzago.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/gexeza.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/u27cc9ikfml7kagifih6d5amt2/74418113108.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/cfdcc07167c04276698c894d0234645d/15161394595.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/gekuvofabesixolafotedos.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/sb6umidis5ahee9bp93g0s005i/49771014811.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/66825055671.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da644558aa---lididilazexilof.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089289ef39f0---24327503541.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/vitazurosapi.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/85950901851.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4894d0a000---kekudivafuwumiwunuwik.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/boxetota.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/69497843826.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/87088961068.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c458bc6bdbc---23493496620.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/ubbgm5ov10isueebcbgk1i07uh/bitotuwufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=colee+near+mePDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea8594f3ee---37492616010.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_off0000c7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CC 9944 bytes
SHA-256: 532bf929493c6cc84b23253a389ac197f1b637d172423a54a81cf2bb11804bbd
font_01_sfnt_off0000ddc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D6 17160 bytes
SHA-256: 7fb5bd5656df3e82aff4f969408686abd68ee05baf24d4923895b63abfeabf17

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