Malicious PDF — malware analysis report

Static analysis result for SHA-256 a978095ab83650c3…

MALICIOUS

PDF

82.7 KB Created: 2021-09-14 02:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3d561194f384b9d571ea98bdf03b16ed SHA-1: f41911b7262c90f82e17c05ebb3e1f7ce9fd1796 SHA-256: a978095ab83650c3409ed8a7607d77d3d4053a715e9367e28fd4d2b89d985949
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is unreadable, but the presence of these links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://hainescentreasia.com/images/file/jipovebazi.pdf In PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613baf1ddd57e---bigumapedejevafipe.pdfIn PDF document text
    • http://micruts.org/userfiles/file/sudimiwig.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/zakakufosunesorejizogaj.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/6bd2fc52d54c3b03a297826c9581d165/59945916178.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/23133951874.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/81625100462.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/55146664896.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/11997ff97f3f58771f3da0eb08df2eda/53617863532.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/94389395963.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/50801589705.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/munetetujojevuwaloxu.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/13816950320.pdfIn PDF document text
    • http://www.bash.cl/media/file/24298753751.pdfIn PDF document text
    • https://playindiano1.in/ckfinder/userfiles/files/jefilitofuf.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/33259130586.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/tuwenivotag.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/papurabiboxolatuziwatuz.pdfIn PDF document text
    • http://xn--80aer5aza.xn---42-5cdakyymnnb9ake1az.xn--p1ai/ckfinder/userfiles/files/72675430428.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec1dc478d2---70035482138.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/vatumolirebamax.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/50955106158.pdfIn PDF document text
    • https://faguaflowers.com/images/admin/file/40731191745.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/xijinebumefuralip.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e2d2521ad---dubisutaram.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=symphony+lowest+price+phonePDF 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_off0000dbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF8 10752 bytes
SHA-256: c7bdff3da4f479a1fc70644222c0a229440a4842caa31c17ac90ce4d6a9a5bdc
font_01_sfnt_off0000f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 18580 bytes
SHA-256: c5325f6ad0bad865e23c88389eb150ced4236c5331924da7639aa1409edb1a82

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