Malicious PDF — malware analysis report

Static analysis result for SHA-256 209caf54a53708c9…

MALICIOUS

PDF

68.5 KB Created: 2021-09-28 03:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0e26dab640e53df06fea8231c31ff50e SHA-1: de00e0cbd0a2a80b79dd8e27029ee9a2c46c29e9 SHA-256: 209caf54a53708c9ff817f8ce7e7342838207f7991bdcca4b1bb71e06d11674d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pistant.ru/uplcv?utm_term=wwe+2007+game+download+for+android PDF link annotation
    • http://makassitools.com/userfiles/file///konafuwutigazeb.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/14095213301.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/c9766205fbae3504dc50f3e4a0baef12/jelagisikel.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/14811966748.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/abd762a4a5736ce22ad5163ffcf6feba/dowufimuluvodizimiw.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/23c6f4798e7550ee83d13cf4768ffc63/xamusegosaxojulegobemiw.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/37142695384.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/55990602586.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/dosifetuzukorujaxuz.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/75854027552.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/sajuririvamuwapip.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/35664924181.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/zevesoga.pdfIn PDF document text
    • https://www.e-oswiata.olesnica.pl/ckfinder/userfiles/files/68070750288.pdfIn PDF document text
    • http://snft.ro/media/file/dunesadunufugezerewidupim.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/90117359766.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/36148328802.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/pulakodatolinal.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/vetixubimipox.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/kemotabajud.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/27763374415.pdfIn PDF document text
    • https://yifff.se/userfiles/file/jusadunobirow.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/gixakujuminex.pdfIn PDF document text
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/megidemob.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_off0000af90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF90 14652 bytes
SHA-256: a8adbeeff8cbeced7b34be915efab2f412f75ad7de388bdcece59f78ac21e4ae
font_01_sfnt_off0000d3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FB 10804 bytes
SHA-256: f4907915c0ef1f278a18ce3d4f64e13cbba23fa169d5fd1f5257c2d371765bc2
font_02_sfnt_off0000ecbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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