Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7196f237edc84f1…

MALICIOUS

PDF

79.2 KB Created: 2021-09-04 04:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2382526cfc89639787d218622486f557 SHA-1: 12adfbcdb3291f8b38ec0590a7f75d2df1cbec00 SHA-256: e7196f237edc84f111407e6374c2845c30692dfc40848b930460df0ac97a5a54
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple external URIs and a link farm heuristic points towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://tantecoccole016.it/file/fanopebisafemilol.pdf In PDF document text
    • https://gilbertems.com/videos/file/jasebuleweponi.pdfIn PDF document text
    • https://unitjaya.com/contents//files/fizivopajawabepovabumif.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/nufefometuzepivazuzef.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/67914559819.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609654fcd686b---nasijilu.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/4087601901.pdfIn PDF document text
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/4295045347.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2e034bc8d---62168793211.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/lanilesixelivosifa.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/enivqc9qds2n2m4mfnsi5cpdg6/xaranubajexiwipifelezi.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/i4nlag5q364dkkhndsgfuo941e/23572424220.pdfIn PDF document text
    • https://jagamimpi.info/contents//files/vononatikonikanojifija.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/31802148997.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/47416493223.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/fewonewofepubok.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/5916578512eb8d0fb3e3f92c79f68cfe/sefibakimidonuporur.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/605589449708b9f4518086a5702942f5/18787182719.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/94m7nbs2a3l09vve1sot482c6r/57855152747.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/93548626884.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/bdd0404b291bec6edc2d7fdf7e0a87b3/6547176194.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/jirarumeduvumepob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=create+tabs+in+excel+worksheetPDF 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_off0000d4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4ED 10780 bytes
SHA-256: 3b80db381e0fe30f8dff80940c3e26962c67c3b6e71648982df4de297b4d3722
font_01_sfnt_off0000edc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 16104 bytes
SHA-256: 9aa1387114cf59979958fc5f83102d17545d6fc1ebcd07f9abf7f2b8cbaeafd5

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