Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26c70c86edeeaf5…

MALICIOUS

PDF

85.8 KB Created: 2021-07-14 01:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 16ea7a8a4eb3d63781c435efd37f5266 SHA-1: b31788826680e9df99c6f0582fa721f2c0c96ced SHA-256: e26c70c86edeeaf5268598a05f9057a48b5de4eb15b94315daa73b472150cc73
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution T1553.005 Security Software Installation: Disable or Modify Tools

This PDF document was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it employs social engineering tactics, instructing the user to disable security software and execute commands, consistent with ClickFix attacks. The embedded URLs suggest a link farm hosted on compromised WordPress sites, likely serving as a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee013d15842---fanuguweduvu.pdf In PDF document text
    • https://diarch.in/WYSIWYGImage/file/29054440974.pdfIn PDF document text
    • http://splogservice.ru/content/files/14319246914.pdfIn PDF document text
    • https://giustofiori.it/file/98862167031.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/48198668058.pdfIn PDF document text
    • http://robbes.nl/media/files/26271783588.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/v9249oviqta4s4rrmrm222cv19/fuzijepelepatezitotibiwa.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/826b56d0ee84ae38d38b4ea7d802c5c9/57933287193.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/42577315845.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/kjsfbho1p9eekiu1md96d8c9r0/kotemomejefebelegajijewev.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16221212695005.pdfIn PDF document text
    • http://webursitet.org/Files/file/19854637971.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/wigekuse.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/06/file/202106271901598040.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/49356030233.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/qib527g6l4glctt7o0lktun684/xewoso.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6912f19f3---sebageboxiguvadonej.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b799990a9fe---lezejuloroparinar.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/pafotexaxiwewe.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/1apob9k1ds4rqr6rjvpldurr22/16799169218.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/tgt3ruq7pct1h2l0lov5rpdkhe/xomesisukisaduvuzit.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/7235f00b855e7810ca570b776ed461f5/jefifojedinot.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/be588b2637c8e3e2e71945da98350c32/37309944445.pdfIn PDF document text
    • http://juha.be/_files/file/fikebijakex.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088db250c68e---83554261649.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=unexpected+store+exception+windows+10+ssdPDF 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

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_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 10668 bytes
SHA-256: 2d805ba02d0a36d16ec1fd8e2f5c9967d8b9310e8bf04a483db3c35581fb11b7
font_01_sfnt_off0001037a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 18040 bytes
SHA-256: 824ed9a29604df94e3a2457b4c6e6a75b9e61db3ec0f369e23dc32d535d8813b
font_02_sfnt_off0001318c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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