Malicious PDF — malware analysis report

Static analysis result for SHA-256 980e116ccd535ca9…

MALICIOUS

PDF

71.2 KB Created: 2021-09-25 21:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d86efc6466b646b840c14e637db17b04 SHA-1: 42a195ecdb0bba2fd3de8e96928d1664bdc51102 SHA-256: 980e116ccd535ca9340bb9de782f1e1c1899bc603846a926d0dd321bd9e38f02
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://catamma.ru/uplcv?utm_term=wolf+warrior+1+full+movie+english+2017 PDF link annotation
    • https://dmshospital.com/mm_engg/files/11904311534.pdfIn PDF document text
    • http://hasomedia.com/userfiles/file/15824458240.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/bulewezudagi.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/90214808976.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/65720834443.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/579594923.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/pofubotasatapovovilij.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/83012122937.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/kolevamatakopijimij.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/libipevuvosesifimukijena.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/93777728799.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/xenumuwavigabawataje.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149378e03cf9---53988246453.pdfIn PDF document text
    • https://schachverein-marchhoefe.ch/fcsr/news/upload/file/rerowigowafadutewobufaxa.pdfIn PDF document text
    • http://phukientubepxinh.info/gomsu/sanpham/anh/files/18479768216.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/20780530157.pdfIn PDF document text
    • http://bakoca.hu/files/file/durafafo.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/niwumufamugofu.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/49542469524.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/mewadagowasa.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/5139207748.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f8bc96280---13168908019.pdfIn PDF document text
    • http://spharma.ua/files/file/maxobe.pdfIn PDF document text
    • https://minhgianggroup.vn/upload/files/96463997264.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210907_115712.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_off0000b0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E2 11152 bytes
SHA-256: 82c10cfd0b858d8fb841d1e69cc42af8c907fd7e956252559203de4f7dfd696e
font_01_sfnt_off0000cae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE7 16620 bytes
SHA-256: 4ccccf31c7b9770420da4100cbe5cd4cf1f74bf5c38786b8b24af4881959696e
font_02_sfnt_off0000f582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF582 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1