Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c30638e62ff9652…

MALICIOUS

PDF

86.2 KB Created: 2021-07-31 23:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: d7db9f3d0d7093640d176dcaa76f51b4 SHA-1: 58932eaed55b6dacfc9c68261988459e83fc31e8 SHA-256: 3c30638e62ff9652ef26a9d3233adb93690a919b29449a7749a357ca205fb8cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains a large number of external URIs and links to compromised CMS uploads, indicating it functions as a link farm. The primary purpose appears to be redirecting users to potentially malicious or phishing sites, leveraging a technique often associated with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://pistant.ru/uplcv?utm_term=what%27s+in+a+bahama+mama+at+tropical+smoothie PDF link annotation
    • https://stmpallet.com/ckfinder/userfiles/files/pisobexoxaz.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/voresenenigiv.pdfIn PDF document text
    • http://zubrcup.by/files/files/buwiwedomiwiruvob.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/49849500481.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/zuvogojufeki.pdfIn PDF document text
    • https://fid-data.fr/app/webroot/uploaderfiles/nawutan.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/db0557e74c4bb07a3e4b39d583a2e2aa/93993416130.pdfIn PDF document text
    • https://yapluka-services.fr/userfiles/file/nedanidud.pdfIn PDF document text
    • https://banghenails.com/upload/file/57434157348.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c30f9b956---78550656217.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822dbfe0047---33531564170.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/6e03eb38d6f694b598f622c1991c5444/63571534995.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/f86cc70dd6220f0d3edf0d72326d8850/vinikexujudififomus.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/hr2f8d8hm3jst2rk1v4duo3m10/vomokubojiborosibafi.pdfIn PDF document text
    • http://aweibel.com/Photo/file/guzeleluridavus.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/69175199889.pdfIn PDF document text
    • http://hotechike.com/files/files/27853139634.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/zadabibuxowelulotu.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/dn6dku2v91s11t45gvmicbvftk/xilaruwipufigaleboluga.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/36563544761.pdfIn PDF document text
    • http://azizolace.cz/images/file/gafurejaxiketuketugula.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/otpaahe8kpsvis44oprgurle83/vefevazivilunofulofom.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8145344256---vosomuzizevafot.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083221ae2cc2---debaxotawe.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_off0000ebc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC8 17856 bytes
SHA-256: 05b595bdf4ffffb73054fdf4b115f4fb52d82d47bfb24f9b9ec67553bc47416b
font_01_sfnt_off00011a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001321b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321B 10808 bytes
SHA-256: 5e9ada7b246df8f85e960d7903ef114d7c3d1c0b536e874967fc7598be1c7331

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