Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c2213f62235866…

MALICIOUS

PDF

83.1 KB Created: 2021-10-06 00:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 2c7959c89adf30031032d6da85fa0cae SHA-1: 6f079a7495170cc48ec3c174a0a337d03e3b93a3 SHA-256: 56c2213f622358667db7e72d8d1b87920d3a43f70e9aa9bcc33981b4de10f284
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely used to distribute malicious content or conduct phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document's structure as a link farm suggests it is intended to lure users to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=dow+fire+and+explosion+index PDF link annotation
    • http://phunphu.com/userfiles/file/81689064998.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/49111746670.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/zagofasifolodasazu.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/sesujutataboda.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/relasotiw.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/vonuze.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/73796973124.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/73649551181.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/9797304431.pdfIn PDF document text
    • http://teresachild.com/upload/files/luwuzimadezikusumifok.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/zeguzozonojuxomizix.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/40245196989.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/24014526119.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/ludekifozenaf.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/10292781248.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/76495181486.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/begezepeg.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16159b932d43fc---pawoveregur.pdfIn PDF document text
    • https://siksp.megarhizo.com/ci/userfiles/files/66607204307.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/88493447848.pdfIn PDF document text
    • http://guowangcable.com/d/files/vobavuramudikoj.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_off0000de6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6B 18576 bytes
SHA-256: 483535139b459115b4825b076b539dad0cfcb4f6fcd0e7c4f9bd1a0c3e06070a
font_01_sfnt_off00010eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAE 10584 bytes
SHA-256: c48875e7d0f04655ead76ce4c5facce55e89165c7c59bbcadb0488be6faa75d8
font_02_sfnt_off000126fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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