Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce98c9d283d2b53…

MALICIOUS

PDF

84.0 KB Created: 2021-09-14 21:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fe41fb53326a52bcca1ba44a395b38f1 SHA-1: 529665526fd4857ab1a44c574e910b6d3ce96abd SHA-256: 7ce98c9d283d2b53253cb008a53f161c623c59f1ec4e25181627d295c4041ef0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised or disposable domains, characteristic of a link farm used to obscure the final destination. The presence of embedded JavaScript and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution intent. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://franchisefarm.franchiseharbor.com/files/files/906927867.pdf In PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ac238c731e8ed1873d2995b5c5ef4194/tivobowijadosefidova.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/kuvofu.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/fenel.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc206e82c7---dazarin.pdfIn PDF document text
    • http://beverly.kopanramen.com/uploads/files/gidivitup.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/valoruverute.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/folarudexudufe.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/giwazutep.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/dovalapojibu.pdfIn PDF document text
    • http://baltic-rt.ru/ckfinder/userfiles/files/papomozubulenirep.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/nuzewupixozavutoxejazat.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/75657089257.pdfIn PDF document text
    • https://izr.fr/files/fenikesisoket.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1613b705839798---15946418899.pdfIn PDF document text
    • http://groupkaishan.com/d/files/gupifakemanis.pdfIn PDF document text
    • https://derfo.info/resimler/files/bexalutubumixelitu.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/46584502180.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff7868b518---navidegolasamowebugulaka.pdfIn PDF document text
    • http://zamgph.com/uploads/file/020955486464.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/72039995536.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/93441238547.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/52334671096.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=watch+legend+of+korra+online+freePDF link annotation
    • 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_off0000e2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E2 10672 bytes
SHA-256: da92d01577fe2c4228e61497fb667cc0e517aa829878a91203c53271b28be263
font_01_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 18092 bytes
SHA-256: 5af54627caa2381bd5016dbe51c9845c3f6af1dbb7c8432d2997f2686847b40e
font_02_sfnt_off000129e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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