Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fded412c4a2321…

MALICIOUS

PDF

88.5 KB Created: 2021-09-04 07:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: aae6ebe64da176ffb25cffadc9e81a57 SHA-1: 894af51251b48b3ee48e510064f2defc362f25b5 SHA-256: 94fded412c4a2321ed50bf865b54b8ea6c87c677da02808feaf9063fd09f6b20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to potentially compromised websites, a common tactic for distributing malware or conducting phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://k-yoga.org/file_upload/spaw_upload/file/20210516195334.pdf In PDF document text
    • https://tonymusic.se/UserFiles/files/58014681539.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/vijivovukebagiti.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00ac652556---65201462914.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160930e5b9a771---vagupozakeguduxivu.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/73025052078.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf954ff3d65---4990949271.pdfIn PDF document text
    • http://rsst77.ru/upload/files/vamukaw.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160fc3a234dc83---safewivigodu.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/26400604088.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1595de7923a47c22db8065c1f8233b42/tezatipafozug.pdfIn PDF document text
    • http://www.petersonassoc.com/emailimages/file/24600170451.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e94647eb33---fatajevopexuzejipuz.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/ditowimamedanepunog.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/4h379abikfi1361ek83e2ndq9r/fiwodosegusamab.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/1715255068.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/kudeveluwajojopej.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/77217344713.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/xijetuwope.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c230423ce---kesapefesufopapujumes.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/sanuveralajoz.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ed2fc5d66---subupovajom.pdfIn PDF document text
    • http://bptramptour.pl/files/file/suxetazowegivideribanak.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202108/file/67090575094.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///28620952366.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/hrv0q1dvfvhtncu3uqutnornr2/8648779856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=ibps+so+professional+knowledge+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 20972 bytes
SHA-256: 3f221d37c22cdef5369804715895368c80b6ca86c8f339ac0861b744eb8945b7
font_01_sfnt_off00012390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12390 10844 bytes
SHA-256: d241e1886c9028e1eeedd534b84837c1daaed453b052458327b7be501aaaf268
font_02_sfnt_off00013c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1