Malicious PDF — malware analysis report

Static analysis result for SHA-256 f960b7fa4585e661…

MALICIOUS

PDF

240.6 KB Created: 2021-06-18 13:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1d7f1e7c740ff5cdb3b277951c3a818b SHA-1: 4ca1cc77975ef331c935e2ba6ac2433e8429e4d7 SHA-256: f960b7fa4585e6615b5356f519481a4f5e129f23cde0f1a7b80c10767a574c1a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as a phishing trojan. It contains multiple links, including one pointing to `https://queure.ru/uplcv?utm_term=modacen+suspension+120+ml`, which is identified as an SEO redirector likely used for phishing. The presence of these links suggests the document's primary purpose is to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9695

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://queure.ru/uplcv?utm_term=modacen+suspension+120+ml PDF link annotation
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfd1569084---kiwetupipotopilata.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/30102392404.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703bf477778---54406596940.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/db94379914a3bc89a29e5210a1dd4b8e/55310115988.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/5783512414.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48bcb25792---jodimokoku.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8646d6082---fixutiwimawanuxetekagup.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160893b22cef0a---kiwisikakasinuza.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/16626714819.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/31084624863.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a267dd670db---tesevapobupokiratufa.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/72932196603.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/a51cff486f57b686e895807a0deb6c95/69021131189.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/topexaxepisiruvobaxafomeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000376f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x376F5 5456 bytes
SHA-256: 3d544a3e1d3af4c9adacddbcf3a8be06cfa320a4198d480b3fd691a62268d4ad
font_01_sfnt_off00038983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38983 12160 bytes
SHA-256: 1e0a0839771e2546ce830906aa30eda264dee36313453fcdd022f7596e17b3bd

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