Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bdbd3d2aa8eb3e…

MALICIOUS

PDF

85.8 KB Created: 2021-07-14 09:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 2ed85e33174318ff9c5f5ed1e40fbdd3 SHA-1: 60b00af4264c0b5db008179d2b8df51e791eb7e9 SHA-256: 06bdbd3d2aa8eb3e1df9d420be17467156abf27357f5d37614557088ef94a387
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF structure itself is also noted as a link farm, further supporting this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=about+the+crusades PDF link annotation
    • https://mobile-translator.eu/app/webroot/media/files/49862690890.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/tatasegilufalogeg.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/luzet.pdfIn PDF document text
    • http://odumakus.com/uploads/files/xinatesavarilixafimuruk.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/7c7b444a84bfa54eb99c5a47dd39a32a/zurimegibatipavij.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/1b45a4i1daahvkii54ug35bv0n/58326201137.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/gatijuj.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/56775619361.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/93702499615.pdfIn PDF document text
    • https://nusbetaja2.com/contents//files/83142588042.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/67549339306.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/28599341260.pdfIn PDF document text
    • http://stavbyhes.cz/ckfinder/userfiles/files/rubavojexomexitiki.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/36223067901.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/wetunadaketa.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/23632772324.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609feccf87207---bikeka.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607685e9d340c---35040401997.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607585fb6be6a---vigedatipuwa.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ef4a1e017---sewibegapelitorewas.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7bdbd0e91---21868518770.pdfIn PDF document text
    • http://guilfordvikingsclassof81.com/clients/4/47/479b0a304b4cdce99dfe3eda73a59016/File/66168072622.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c24a75f20---40002952275.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_off0000ec73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001048a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048A 10448 bytes
SHA-256: c1e9b9d81cd83e78a23e98ebf2b8a59a367c4ee1513200ec35d2f383aed55bb4
font_02_sfnt_off00011c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C76 16964 bytes
SHA-256: 3f4c0aaa05efbb47c2dff450e2290d8d348d1da05b5c041aaa6989cb37474a3f

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