Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ea9afab37b8892…

MALICIOUS

PDF

87.9 KB Created: 2021-07-25 00:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 92476c1796ca62c822d38d1ab8e45a5b SHA-1: fb261a7e5d266e41a654f60dcf6a0513556e3c2a SHA-256: c2ea9afab37b889277c3fa2f3814c434c407250ce5e285b03eeb3ad458a047b9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting sites. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://jedwines.com/cmsCart//upload/file/61199134314.pdf In PDF document text
    • http://hocikto.info/userfiles/file/17482329997.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608848d0d6e4d---91014430218.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/nigezuvomas.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/adbc0d83703a806ee2f8d0592bbea85c/94855353658.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/9831739820.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/giwojexajizogem.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/91578502070.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fbc3eb7e81rr2v8fujjt76gj48/xifasoped.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/figubujakol.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/d458d501a310a8aacf8f3921d703f554/jigijamasanexowa.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/50694727977.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/betenataxuzefowura.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/zokokumuleka.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/mebixozozu.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/e184fe7acc29a789c9b99b0ba7a49e51/lofutoduforuze.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/13159588187.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/jumskbhib6ii64e919tr26d8jk/selomudakuko.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eaa561f1ea---deruzopenatuzemajil.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9121f250fdc21d67398abe2fe3c89d8d/letaxumoxadupexok.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a195a357cd0---feniduwiluvul.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/tn1uq36ndnvk1sr14r0e3qu2tg/34302166513.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/fd87ba923fe786ab4632b238fe382339/25964221683.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=defines+beach+formal+attirePDF 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_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 10740 bytes
SHA-256: 35e16f96e680aeca9f25bfb77efe568cfae20a6ca60e5a249685c8e766440c63
font_01_sfnt_off00010cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF0 16828 bytes
SHA-256: a9d5997d6a85014816081e7b181811277d4856697bc661bd9be473275663e553
font_02_sfnt_off00013857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13857 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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