Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec48941e91c89ca…

MALICIOUS

PDF

69.0 KB Created: 2021-10-03 17:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ee0685da5c5aa8a19e7bbf058784b377 SHA-1: 0e0b1b9c9d2575ad9ded6fa8afa66ee511668be8 SHA-256: 9ec48941e91c89cab739fb9e246a669986e2fa1e348893d066526410107d913d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading unwanted software. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://inwebjor.ru/uplcv?utm_term=spellforce+the+order+of+dawn+download PDF link annotation
    • http://media-production.net/admin/ckfinder/userfiles/files/98353998861.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/gazaramidijulodiseriwem.pdfIn PDF document text
    • http://scarpatti.com/files/poruzunemotuwot.pdfIn PDF document text
    • http://montereypark.kopanramen.com/uploads/files/savurominizejefanar.pdfIn PDF document text
    • http://agama-rc.com/upload/files/11158813092.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/58530267673.pdfIn PDF document text
    • http://patrickstaxi.fr/userfiles/file/pimux.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/nirerosubadapepalujurew.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/24ba51f99620fa920273c6999addccdf/20740113861.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/rixoxokaxaxigiziv.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/48769863280.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/be33bbb4271455c366e2ed3ee9c229e2/85404063521.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/33770943742.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/saxilunulotonenuwe.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/43883663737.pdfIn PDF document text
    • http://ulsantour.com/FileData/ckfinder/files/20210915_A9762BF92A9C5AEB.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210916043824.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/4704922581.pdfIn PDF document text
    • https://war-old.its.vn/new/userfiles/file/davigekolazinudutaj.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/20354238335.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/822213761.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/nevakatikezotexuninexere.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/gusopuginokijodorara.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/bafuzufaxatumi.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_off0000b12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB12C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93E 14548 bytes
SHA-256: ac149e76f79bfaacb0f5233d7b1b776fe92736ef687be18a59ac02535c8a289a
font_02_sfnt_off0000edc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 10620 bytes
SHA-256: 84b06b5cab0bdb3c38ca8dadc5431179492fc6dad45be98a73d73161ea72204a