Malicious PDF — malware analysis report

Static analysis result for SHA-256 c793206761c01598…

MALICIOUS

PDF

81.1 KB Created: 2021-09-05 04:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4d3e53ed256940e3f2c0fd047ee4304a SHA-1: 8e3ad948928ca3fe8ddb5a93132e0ccb129f8856 SHA-256: c793206761c015985c74937797d0f83113475168f632866598264b33d4a3ab7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the presence of embedded URLs and the heuristic firings suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/dd17f8548a657383a49ae677bb77e398/maredixulezulasofavobev.pdf In PDF document text
    • https://riolospettacoli.it/filesUploads/file/waduvetekejigonadiko.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/vakarorixip.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/valurelodawanekane.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/sajogigijedeturalugilixit.pdfIn PDF document text
    • https://dm288.com/slicice/file/26671996477.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/d3c9b8e51a12c6db6a7ee05c4350422b/fepelidodisi.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/puferab.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/wazara.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/73961604863.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160771bd4b429e---42106532523.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/16429339975.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/125294456.pdfIn PDF document text
    • https://airbays.com/userfiles/file/vedowobenimepexusez.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/76055039692.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/4446000485.pdfIn PDF document text
    • https://subarini.ro/mm/file/vapepal.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6d53323db---tigadosimepukosebuj.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/62421314939.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/1g1rqhb22k0vjijjk9sf541f1b/kovetepegutivirixu.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/vevemivix.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105191638.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/37321947381.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=literary+theory+pdf+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 10584 bytes
SHA-256: e1bbccae168283884bd362312f6f5aafae38a7d9774843b29a7f31beefc220b1
font_02_sfnt_off000108c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C4 17748 bytes
SHA-256: b88173f154c267ba58f605f4a81c4e7f21d5d575afcd988623f0563671fed7ad

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