Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2df0a75a2aecc0b…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 01:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2fe2cbe3f946593dfa725a49b1ce9553 SHA-1: a870e5daef55f2d6244c6fa74827712884fa668b SHA-256: c2df0a75a2aecc0b60b25948bdaf11021d4b11fed102a5dd43c129023701004b
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://allytemp.ru/uplcv?utm_term=sync+my+phone+to+my+laptop PDF link annotation
    • http://farmandari-sarvestan.ir/images/news/files/jokudulokomigitavifa.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/3a50eb3ba7716bcd3b7256d710d26cd0/10228127409.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/39285317511.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/tegon.pdfIn PDF document text
    • https://506hlapeta.com/files/file/lesim.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161305919095e7---56673914597.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/zugesegev.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/99981735735.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/jinavolaj.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/65677615103.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/momigapibuzawa.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/96863455027.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/65747316684.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/16541955086.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/64870852384.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/loridexuvog.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/walidonejugigewulurubunav.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/vunuzixuwumop.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/92579559520.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/jodipamazil.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/gerasawisogirupojovu.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/89348760295.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/fomitir.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_off0000d6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DA 17020 bytes
SHA-256: 527b0175456992a92132ad16dbf8ea4297854aff69fd624347627bdf86c06646
font_01_sfnt_off000102e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFB 10468 bytes
SHA-256: 1702cb1388b10ac3834693418496eb8c5ff88dfba55144800ca453d712ca5b34

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