Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a402d26f5ef2cc…

MALICIOUS

PDF

88.5 KB Created: 2021-07-22 10:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1a77c218a73a997dd4638df53940a8d0 SHA-1: 5cd20b2f640755cfd607acfafaf5fe44e038bafb SHA-256: 62a402d26f5ef2ccf579b487686eb7cbf271166769dbc745193bfb02ca2621d0
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The file contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The presence of these links indicates a likely initial access vector via spearphishing, leading to exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/460a67564f811262a8407c5d0bac0512/30837545140.pdf In PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a69d051cb1---72061689571.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/doviworuvigizinifazivozem.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9f0276e1f---24540849618.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/71807283372.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/82860875609.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/c35cdfaaf368c07288f177e9bea77fcc/wuvezep.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/mazilodesinor.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/gapadenafukawixikonu.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/fativanowilosirogugixe.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/r95o9s2r90jnb794dv1sbqo776/kuvapetemakoterifa.pdfIn PDF document text
    • https://x-software.cz/data/file/38045964223.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/af6dbb699967bdc854fde9cfd9b8bd5f/59558649277.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/10000689288.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/37397480348.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/91550333342.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/gibovuji.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607079399ec0f---fokozonetilizeris.pdfIn PDF document text
    • https://lapakunited.com/contents//files/61460037062.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097992cef27a---fumonawoponusi.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/tomitozobavutorixikew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=globalization+according+to+manfred+stegerPDF 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_off0000f445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 18304 bytes
SHA-256: 01daa2166ebedb9cce0eda92a51e473a8c004011ac41a3297a1e107269cd2c31
font_01_sfnt_off000122be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BE 11056 bytes
SHA-256: c65269aff16d8d2e147b753555520b8204bb0f9679523960e708268e840b58ee
font_02_sfnt_off00013c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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