Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07e06feb23d1960…

MALICIOUS

PDF

89.0 KB Created: 2021-07-28 10:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e3fabfd9b1bb4e10410e43019478bf50 SHA-1: c155d5379822b4a972291e4965027eba7f5eacce SHA-256: f07e06feb23d1960be5033b7763e5e8cedf6d3c1bfb9076866e607281319feed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, indicates it was generated by wkhtmltopdf, and the presence of PDF_URI and EMBEDDED_URL heuristics confirms the intent to link out to external resources. The primary attack pattern involves using a lure related to 'salesforce developer training guide' to entice users to click on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/38953829454.pdf In PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/0a2102b16c84f255ac962187ff57dd85/foguxulakuvatedajir.pdfIn PDF document text
    • http://hillandcunnreunion.com/clients/864369/File/64758059340.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/77489549056.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6195da2aa---sogojulizutuxevelalix.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/83738617802.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/wuwina.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27bc7696fb---sutupusir.pdfIn PDF document text
    • https://fallsplat.se/file/55647629667.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/kuresovewogomis.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/45005605323.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dc1c8c3f1---bojiwutotoj.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608752fea69ae---surasavafuge.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160e03b0e1dd7f---35317777759.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074a80d77fc7---31701547527.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948566d693e---ginuwumura.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/86473506361.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/2db6fb753999595ed445afe7b88ba042/79213468470.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/85cafe3802189eefb99fa416433f5477/58932480582.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160808b45b142e---69616814630.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///1720902751.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/favapa.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/30f9d82dfbaf45bff37dc7445787c6a1/kixejoliwiziwodu.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/fd3187582bbe7da37e4e0f0f3faa95bc/22143313090.pdfIn PDF document text
    • https://.salesforce.com/services/apexrest/echosign_dev1/template/load/?masterId=&varName1=varIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=salesforce+developer+training+guide+for+triggerPDF link annotation
    • https://__.salesforce.com/services/apexrest/echosign_dev1/template/load/In 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_off0000f6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC3 16932 bytes
SHA-256: 7c16250d4876f1e459fb98b6b57e05d319e3ec6731df42b6856d71b778bafc5b
font_02_sfnt_off00013b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B10 11036 bytes
SHA-256: 5263330cb76a85014073b95b1e025981b3dddddbc6a00ac8349449b48491f09d

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