Malicious PDF — malware analysis report

Static analysis result for SHA-256 06785eb2eafc0611…

MALICIOUS

PDF

83.0 KB Created: 2021-08-16 13:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4ce29b6fbec4447d30434d804f718167 SHA-1: a04a7d42072641879b2d694533d37722c880269e SHA-256: 06785eb2eafc06114f15be474a436fd80e6feefc6744266a9eb2341a00ad9e4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a large number of links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://wastran.ru/uplcv?utm_term=what+is+an+example+of+a+formal+region+in+the+us PDF link annotation
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608a907b541af---juvajobujokog.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/18943941249.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2bb9e5fcd---dedonikowumuluwuk.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611739650695a---65089131432.pdfIn PDF document text
    • https://digireg.pl/upload/repejetovav.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/54742709087.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16203549947897.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/fuzutinigaje.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/95451ba19116530bed9b2972bad83a6f/25801788158.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/hsonvp2fr1fdbhr965q30sp5h3/kagebiz.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/wuketujedigexopinoze.pdfIn PDF document text
    • http://hevolta.com/upload/file/24429308180.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/valafemuxi.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/8a6cb06d5fe557cc83567c0569a14c8e/funewotijixizusixe.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/vurinin.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/87714158e70c65296ecf3b612550273a/walivoxatavanowa.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/lopojezuzelimobotaxekelif.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b39ce1df65cc262a417b038b986bf1f9/genebufen.pdfIn PDF document text
    • https://rasorestefano.it/file/7261018449.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad66556ca45---guxesinogu.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cda319495---wavifexosifikakezededal.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/74887412162.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/958e4235e7757ea48e8644a74fb5bd5f/28837454026.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_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 11000 bytes
SHA-256: a7c568cbd2c4d58d22bc3cf6f16671b4e5f2424aaa5893262d03e6704eb193eb
font_01_sfnt_off0000f8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C6 17552 bytes
SHA-256: d17cfea22e7bc045902064f549e0e378c04c8f628675eb7ba7dd9ad738e04132

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