Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f21cdd8e0e84eb…

MALICIOUS

PDF

87.2 KB Created: 2021-08-14 10:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 312786afc96ab123199cb16ba1addf52 SHA-1: f409d87ce0304411ee840be2c07a6a2865b6275e SHA-256: 47f21cdd8e0e84eb0f2fc01a520eb3dfdcec55e3aed778f6e7ce5a6dc6e5e37e
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies this pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://forexinc.ca/upload/editor/file/jexutinezajavizo.pdf In PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/b594be04dc8ea07fc569477db9cc5a32/61152349431.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/2418352883.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/bozuxevesokuni.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/povonetodowuvenogujiku.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/devefunoxos.pdfIn PDF document text
    • https://mszukam.pl/dat//file/xoxosuboturofitijalo.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b17563d4a---54991363763.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/86223fc089463d534ef8277dbde773ef/39253181560.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/3601019ad864ecbc4830f724c73b7f98/zofezopawulawo.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/nilonuvuxewijumawelu.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/mijitijusubunuraganu.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6b69986c7---birekoronuxale.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/49038797079.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160836d04d0288---gulafadojaritivavaxazafuw.pdfIn PDF document text
    • https://elemonbg.com/Files/File/1596364101.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa2f3cdf54---77304305151.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c863ee9556---sedoxezig.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/72115075231.pdfIn PDF document text
    • https://kaptenhoki.com/contents//files/novasaxumow.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/sokubav.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093e9dd00b50---moxekanigefibosadivubos.pdfIn PDF document text
    • http://efeotokiralama.com/Upload/file/23159742635.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/tidibabiporatekagez.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/8a6b41d6183cfe364c8798d466e30449/fubilodilamajasom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=t%C3%BCrklerin+tarih+boyunca+kulland%C4%B1%C4%9F%C4%B1+takvimler+nelerdirPDF 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_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A5 11412 bytes
SHA-256: a713095fe86f551fff7051c95303294bc730c5a8df12f095986fe96ab3ba8e0d
font_02_sfnt_off00011dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD1 19204 bytes
SHA-256: 0624fe6d6fa5f0077e5128f38c820f1b77b280a1b7a73b258887a80cd009fb78

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