Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4fa30b84e8c202b…

MALICIOUS

PDF

85.2 KB Created: 2021-06-27 06:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e8954bb9dbe59b6bbbd6882b090a8536 SHA-1: 0e6d50071649a5f729e0d3c2d711ad9c40580f65 SHA-256: e4fa30b84e8c202b5a312362bf77b1bf33531393d448ee3ea9b7d6fb53dbe82f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous links on disposable hosting and the use of UTM parameters indicate a deliberate effort to obscure the final destination and potentially evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd7934b53c---samibivosagowisuzevetitaz.pdf In PDF document text
    • https://saatyapi.com/upload/ckfinder/files/84670995959.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607e144482c0a---89958541031.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/84985886299.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607820efde588---33471727095.pdfIn PDF document text
    • https://33mobility.net/uploads/files/78809504382.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/jixabir.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/i01hcod9qrjuvglkhirb7jj83c/manijenemaxulegigijox.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/187e2b4e5b1b4bf496c5a44ab03aa92f/jugezifafid.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8814dab4e---26949268503.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/67867225152.pdfIn PDF document text
    • https://signika.pl/Upload/file/bozilik.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/14d4ded71c1b67730d3485f76538f191/lewuzamexugarizone.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/72729338242.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16084cf96b0b29---pamupi.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/ee6616fed7fb708df0414c6dc96fe4f3/kelasifomerixoxa.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b60cc299a---tuvojekovuxojobuvunejiju.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/zoxezefipo.pdfIn PDF document text
    • http://jngf.cn/files/file/8070146883.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/gosar.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/3d4bb3d8f1397a4599e7286317eb9da2/99604866343.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609acd56f345d---43693175004.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b411e4a3e80---fodesegazivoniwaxarega.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/voriduj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=another+word+of+earthPDF 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_off0000e9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 10212 bytes
SHA-256: 8737e459db3d5402ae035c446cf08be247f4bfbecd27d19520b6e3cdd992e0ce
font_02_sfnt_off000118f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F2 17200 bytes
SHA-256: 34a561ba7071f5e86990c2fabe430d99a8f86645fb51fc03394b6b3edbe1a049

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