Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b212d786e2d8900…

MALICIOUS

PDF

86.7 KB Created: 2021-06-28 11:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dc9ec94271c5edd2d5e9f6f5f43094e2 SHA-1: ddb2d45feb3ba34f279e7d30cc797feea9fa2ec9 SHA-256: 6b212d786e2d8900d756968e817377a7531d6a284265149401bb6923987c34c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The presence of embedded URLs and the nature of the heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/e877d9de139870acb905e5b17b1ad6fc/82776297938.pdf In PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/ufari2vq0gibbsc6nvolocji7o/dojasafukivuditowarejevo.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/sitalojod.pdfIn PDF document text
    • http://transinfosoft.com/userfiles/file/54768233995.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609628e46797b---nobaribuzakorevu.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d23a6e05a---zisepura.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/e879c3e05b62ae6511ca37aac6b5af2f/kebovudidedavujofobab.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/0h1mrl6eem8fi5vnfgvqom4rce/xagatapivemad.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/naxuruvu.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06a55d2cb8---fibusapipapuzezogu.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095dad178a27---11764975534.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/477022259a2db6fce5e16f1114a3b9c8/majujabebaropovuba.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1ac062866---99216429412.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/wasufevowezowo.pdfIn PDF document text
    • http://fructusartis.com/i/File/fufavejepekozakasege.pdfIn PDF document text
    • https://jagominum.com/contents//files/kirulabamegasefoxudikiz.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c390e34c4---kejoduwopefudenepekirogut.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/pozapoxunobazuni.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/lebaxopapimiwoxizazupux.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/sofeg.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/512c94e66ee13c1b737cf8ad69bf5dfa/vipudiwuxofejisuki.pdfIn PDF document text
    • https://chpcentre.com/files/file/11439187726.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/loparuzexupupomidopafep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=apply+to+more+than+one+position+at+the+same+companyPDF link annotation
    • https://mediaget.com/userfiles/files/78627773599.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF055 17012 bytes
SHA-256: afb3652c5c7f1f567af9c7371bad6a0401bdbb588e9abce2575accb907b2abe2
font_01_sfnt_off00011cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCA 10732 bytes
SHA-256: 35ec8d905e4a9f88f6fb95af9d64d5e5b343e4db28ca4966aab480cbd1f8ae66
font_02_sfnt_off00013551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13551 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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