Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0a13e2b08f1531…

MALICIOUS

PDF

78.9 KB Created: 2021-07-24 03:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 87472a09df1cf90abfa1d4c796f8816d SHA-1: 9804de2b0424ea6b80694a55ef03abc001ad4ecd SHA-256: fe0a13e2b08f1531fbdf606c24691e3eed033e3c63b80e7c7e8c82185a327474
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://dodatkireklamowe.pl/web/uploads/files/fufibavekejefiwelunigabi.pdf In PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/si68l40mvo9e7bmqnnqfgcpcna/52771129389.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/29848655008.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/174093587160c9a5ba83850.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/seliditilapolunew.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9988e55138---83321665721.pdfIn PDF document text
    • http://ubest.ru/images/file/bafejurixejapupeleviv.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/69miaclbq15gqmgnhossm4e8ti/17808869935.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/11098968432.pdfIn PDF document text
    • http://beiks.info/public/file/tijosamug.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f97bdeffa2---83928562136.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2d6rpet762875go4p5obj4r1h0/xopoxabavuxonogekajapab.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/tes6ldmr92bkgqjtasjss9ehgi/47063582917.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/da6972c34fbb1457eddca165b4c36a7b/64280676936.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/19381085614.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/f95b4af04bc08f994d1c476c7d2576dd/67082452208.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/rejopidinufegatoxogovir.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/tn4msfciodjnuj455l29nttcv4/zotorotexefusedorasesugi.pdfIn PDF document text
    • https://wonkingchina.com/d/files/volibilulalimuzanawe.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/uu9fa960peinf9to98112gjmh0/kitawulolegezaxokib.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/1a0e958f8a8063501b823bba4f9259f9/69561165114.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df5518c4915---xaxedelitilopajazer.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607923f223160---7695696348.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/90041695323.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=harman+kardon+hk195+speaker+setPDF 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_off0000d0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B4 10956 bytes
SHA-256: 565804d4b49e5a51bfc996f0ab62bb0ad86c592cb3c57e4a76936d5ea6ec63bc
font_01_sfnt_off0000e9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 16532 bytes
SHA-256: a327d97834a795cf334177a3644af2fae8cfccb9234d7d460a7cebb8459ab7ba

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