Malicious PDF — malware analysis report

Static analysis result for SHA-256 670a45e005ce6ad1…

MALICIOUS

PDF

75.3 KB Created: 2021-09-14 07:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7f0734729c4de76c6f1928e77216ef4e SHA-1: 5c781ae7afd8830742b143976ffbe6e7d660837b SHA-256: 670a45e005ce6ad1b1be2013337e90a28cd2051b1ef1d5144e6cf4e774f1fbe2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links, many pointing to compromised WordPress installations, suggesting it's designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=all+contestants+of+indian+idol+11 PDF link annotation
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/b600an923nlko3cjbu5auctbd6/folimu.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/65346389979.pdfIn PDF document text
    • http://lscapital.it/images/file/nakixunolufiwogusitigabog.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/lujusirisajedomigexafuna.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/nodubi.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/befokosakaw.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210910163124810386.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tepozipawox.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/19709266636.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/42404465097.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/92721878955.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/xelesanugoko.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140167f00fae---lipivedesolixeneboxi.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/2909563140.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/krdgunij8b7b7taht9l7p8a90m/wajak.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/bewupuve.pdfIn PDF document text
    • http://horvathortho.hu/tmp/82308543932.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/patovajonujebe.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/siliwa.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/gefotazafulexajawororu.pdfIn PDF document text
    • http://hzdsbg.cn/uploadfile/1631041455.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/siroselugox.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5c1e084f8---luwobozojosatali.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_off0000bfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE8 18456 bytes
SHA-256: 33059d565d88ea0be1d94270818055f637c057aed5b2d73a970ac2fd83654db1
font_01_sfnt_off0000efc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC2 10400 bytes
SHA-256: 96039c37ebca65477a71ef3608d0455d75d15d5286c21a0179c23791f1b194fb
font_02_sfnt_off00010788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10788 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1