Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee41fc66570c679…

MALICIOUS

PDF

91.9 KB Created: 2021-09-06 09:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2ee32df7e2060547625547879c74a511 SHA-1: 48bab41972e9dfad200eecec8032930984607050 SHA-256: 2ee41fc66570c6793095cbe216486aa29894118e6b921fc81d61968d76d22be4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content. The presence of PDF-specific heuristics indicates potential exploitation of PDF vulnerabilities or malicious content embedding, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://krisoc.ru/uplcv?utm_term=doce+tradiciones+de+alcoholicos+anonimos+pdf PDF link annotation
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094fb7ce9f75---61356098324.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabd1672b5c---65977755089.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607a78fa9bc63---17868630486.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/ropufasusanijaxiwibutipug.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911e8b8b41d---kujogaxogugil.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/35337674305.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/wukedosasexuvuwi.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612bbc67e8665---zimimemegolifavugenivom.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/a2ki963j6hm0tkhqb6f7qlm9j1/34230402202.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/79587875360a66c58dd2e2.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/66c40b9b73e34884adfc6a17f896a8cd/fozomaxodijolugegibo.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/26gd8k9uslggilsq2dscjrk0dk/76616572391.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/ef194aa7bae4eb53e1ff7eed4fcd8536/zitusojid.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130500f2b8a3---fimofisamuwifeborun.pdfIn PDF document text
    • https://losungversorger.com/product/file/83219669194.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/871a8803111997e0954529ba7b224c0e/84009674906.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094afe56797e---savobeji.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210705055335_1xgnsg.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/79122953406.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/57216227510.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/3008f6a369837d2b07f985e5d1a13034/xabiluwovinerubaru.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/dafasega.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/32417028301.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/63025114233.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_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001137d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137D 20408 bytes
SHA-256: 18bd6623c91c347c0d09f13bfa73c8dcb192cf4cfc5036ea28c906d03a6d137e
font_02_sfnt_off000146dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146DD 10888 bytes
SHA-256: 1053f9d311eb75a094118b19d5d7987c0b865c248ef0efc43b5744c2f2523648

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