Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbea0ab24a5ca09…

MALICIOUS

PDF

75.3 KB Created: 2021-09-06 23:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c432b0212302607a0b0e7c5df5b3170c SHA-1: 1ce2beffe44edc84ca6960936824b302304f411f SHA-256: dfbea0ab24a5ca099b5defec6cfd940331bad11270ec45d22f2e8c232122c071
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting, likely serving as a lure for phishing or to download further malicious content. The presence of multiple external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest this is a distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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=cultures+fourrageres+pdf PDF link annotation
    • http://www.allatpatikapecs.hu/images/file/49524355149.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/1dab625bbfe9f4dfc71c50bceee50c25/68830626823.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e6656d8f---91305396647.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/45556195521.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/e1ac74bc663767fefa9f2d3e84273a8a/tinepugasotexevin.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/22c1a13d746fa91cd60666a7aee08fde/25885466003.pdfIn PDF document text
    • http://igorodstore.ru/files/userfiles/files/lakebinezawesal.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fec0c547ddb---46065499772.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5225d672d8---66790153958.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/xulupolewevupabitonakan.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087973c5b582---70139149911.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/subuwaweme.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609091f8b09dc---30103169630.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/98033586484.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/45284307321.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/73765561645.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/durunem.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/49654994233.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2b967fa1d---88092169372.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160bb564da21c3---71407511730.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/48033994692.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d6cb15ecb---xatuxuterubenaposemusuz.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_off0000c503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC503 16952 bytes
SHA-256: 6b8950c6c2f7c71184166cea2ca0bdb449cd50c5d35d7fd4b1723b34587f2b76
font_01_sfnt_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EB 10608 bytes
SHA-256: ac93a5ddc4a8c0bd6b89358e4728ab16aa74cca627cc359d575c0082d99f9b09

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