Malicious PDF — malware analysis report

Static analysis result for SHA-256 df08fa9e5ae407e8…

MALICIOUS

PDF

75.1 KB Created: 2021-09-25 11:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d3205815286724edc2465db01b9480e2 SHA-1: cc6f9aec4473821a915ec10387e7b365336fc760 SHA-256: df08fa9e5ae407e87a0790ea80215060182a837db44a1d595a82ac3e918678eb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is identified as a link farm, with many links pointing to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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 https://laborke.ru/uplcv?utm_term=best+settings+for+ppsspp+gold PDF link annotation
    • https://zoorichi.com/temp/fckeditor/file/kakotasesoj.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/tenikitogofuk.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/vuzajaveriwinuvuwuta.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/tukavenekid.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/78480841251.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/300f6a61bb7c0469a3c9c200493d6053/nijomalomeripamojos.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/60960035011.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/37566197226.pdfIn PDF document text
    • http://fabtur.ru/upload/files/43519961439.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/zazoxizibebuzolupiwagolo.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109061000067631.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/masuwub.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/tavinozexizuwap.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614e17f4b3e90---44239251448.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/rovumizafebora.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/xaparikogejip.pdfIn PDF document text
    • https://rotitelor.com/contents/files/86430339999.pdfIn PDF document text
    • http://stnicholasway.com/userfiles/file/84628943102.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/zarokepuniv.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/panipexoda.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/3852517719.pdfIn PDF document text
    • http://ge-mak.com/files/kelolobafadovudimiledu.pdfIn PDF document text
    • http://vinhthuan.com/upload/files/bakinurarugan.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/9b4866b43f67067bcbabbe8f95c15b6e/bedukusaxijuv.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/25619607795.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1614118d92661a---87895115632.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_off0000bf2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2C 10564 bytes
SHA-256: 44f9eab570000686d6bfe765c70b08bc56543c7bfbfdc3ffd07f48aab73f4df5
font_01_sfnt_off0000d722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 18248 bytes
SHA-256: 6daa0ebcd56e6704db89036d26dc42e9e1b8f2c79903ae6acc7999e9701c2d0d
font_02_sfnt_off00010680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10680 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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