Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f6b93cbf39ec4f…

MALICIOUS

PDF

87.5 KB Created: 2021-07-22 05:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e3eea511e21e3838eaaa64cf268a2d6f SHA-1: 775ab9cb03ae979a7ca4e6dba55d68b80344168a SHA-256: c7f6b93cbf39ec4f12f0def5c28f70c2faf6da196cfe0b12d5cbe24f200d1490
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. This suggests an attempt to lure users to malicious content or phishing pages, likely distributed via email as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://casinodanmarkjackpot.dk/userfiles/file/22155483272.pdf In PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609084115c160---jowomibipewurutivedikam.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/zadepilozulawanoxidiwuvu.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/9h0nq0lhbl4upjisqhs1hmv169/kijefetofudisuragavepozi.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/nokoxajuta.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e64706872---76727976418.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/53525050988.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/koxugomuvenip.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/inu8vlip2nl6l0o2jb4mt8ne0j/91053990091.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/54130596009.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ce4ebabda---nimimijodid.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/mijipugadomerak.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160deba00ed7ba---sidapiwuvobovarabi.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/76706408459.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/nisigojozixagusage.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16072f90794b12---55176545991.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/04769f26c877b009a379f882dc1c4505/gotepokufozup.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/ead7c20cea6551a35a424afece441ad3/sivokiwisunitamovus.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/sodakaso.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/14367364134.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/pedudosevegekami.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d36ef7b09e---34314693703.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7fa47db1e---vuxujosut.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078057ba7e13---12722189883.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/80785691690.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/b37ce95812892418785ee49d9c6a9791/84249679204.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=hearing+aids+could+use+some+helpPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/84e7fa1a1af67fcc3146f46463a3c626/17818882200.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_off0000f1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FB 16736 bytes
SHA-256: 3f6aec46a363fcfb3a8e90f0c324ea1532b1978a8bd99158178d180642707cb2
font_01_sfnt_off00011d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13576 10956 bytes
SHA-256: 6a30aff856f7d3c4930b5bdf45081ffd6762f2bb24d31faa14392899b4f5b215

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