Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1024f477aaa299…

MALICIOUS

PDF

73.0 KB Created: 2021-09-18 16:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 6efaa33b5aae225d09c5a7a0cd17286a SHA-1: 8611017fdb5216044513a46f8b040ea4ee371b04 SHA-256: 7e1024f477aaa29907393544d4fbe3ef670ae24b2763cba4b1e806e68d311295
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised or disposable hosting sites, designed to redirect users to potentially harmful content. The presence of numerous unknown URLs suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://sarna-zapiekanki.pl/ckfinder/userfiles/files/88320449236.pdf In PDF document text
    • http://studiosiciliani.eu/userfiles/files/76369090842.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/f1cjiv8fkh3j97cq53tan470j6/83625587350.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202109161434317892.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/55091696958.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/mozemitobiwidexufo.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/kipinamuposadetakibo.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fb6561be4---32547099233.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1630742585.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/c9a67df555f47dc2cb4d5dfdc64cac32/32519406844.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/ripap.pdfIn PDF document text
    • https://miet.hu/kepek/22017937341.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a829e36a61---66460255959.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613298e05b2b1---51778417182.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/68148497866.pdfIn PDF document text
    • https://palet-school.com/files/files/74122533077.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/445b753da4c32ebf161526afd9baa7cf/96245272169.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/vatekasubosezifi.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/vavinevaj.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/32949106432.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/38170526415.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/sijawejuga.pdfIn PDF document text
    • http://wsmr.us/userfiles/file/22868057845.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/81016036764.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/fawuwamibo.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202191135156921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=resort+empire+frivPDF 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_off0000bc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6D 16684 bytes
SHA-256: 8b75362362a8d60d49f1e26e23fd3fb969e411aa665b5ac666aac730579a3cfc
font_01_sfnt_off0000e6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E4 10316 bytes
SHA-256: 0f6b9b65e7ed9f7c63b4414120a07468e67769045802907b3f7d8d9fca257cfa
font_02_sfnt_off0000fe37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1