Malicious PDF — malware analysis report

Static analysis result for SHA-256 977e4493af163c85…

MALICIOUS

PDF

91.4 KB Created: 2021-07-29 22:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 84e549b62d14d9a75ab47e96355558b5 SHA-1: 89b06ef5295475e149f2ab7719f28891b6b8351f SHA-256: 977e4493af163c85a14f01d541acd7725f7e2938331444da2df8c72e259e6d0f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://irlanc.ru/uplcv?utm_term=is+there+an+app+for+interval+training PDF link annotation
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/vipixotitegewovoboboju.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/gupolikemonokuzukagajukoz.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/kigamirutujebufanu.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/viwepefuxaviwibuxomoxinim.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/18285339383.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/83337001345.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/bakoxugafujuxos.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/6d9f09509cdebd21e2b1f4e82f8647ca/8518486094.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/b6f7e8f9010268f8fb60e79015f997d8/82975403246.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/zibodizowizat.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/84696890018.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/4mm9mian9gbauvo1ul4jnb1cn4/wevikata.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/90biuavaf36bu1ldf536g1ivk4/29467824837.pdfIn PDF document text
    • http://livestocktool.com/d/files/70355428546.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fcd0e7adc---poziduzosanezufag.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/sogumufefaxirejoxod.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/73940541549.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/gozetesozutulokova.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8a412a5c2---wenirowufikuxozumokofatob.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83d9a5f475---3314135195.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/69032434446.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/dikatusoweribarakezuwadog.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_off00010128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10128 17264 bytes
SHA-256: 335035ae793936323a3e197ab9686fb7f2ad32af98d4976b76c7537fd67e68e6
font_01_sfnt_off00012e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6D 10652 bytes
SHA-256: 5aa095d3c885c17b8b98f067b2379962661986b56f4b91bb575f26d4f8baa96f
font_02_sfnt_off000146c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.