Malicious PDF — malware analysis report

Static analysis result for SHA-256 565d2b9d777465bd…

MALICIOUS

PDF

71.0 KB Created: 2021-06-23 23:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 97e25f69592e50809038028cc486d9ef SHA-1: bd25b4c631474a3d4bb68c5e58d9d911575c869b SHA-256: 565d2b9d777465bdc9084a83a59dc47fcba307931c50f4ba2c180c40b57adeb7
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 high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://laborke.ru/uplcv?utm_term=the+invisible+boy+text+pdf PDF link annotation
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/e1c522d8be27c187fb5f6a6e12434b1f/winakafababojitax.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f86f13729a---makojamaririxizoxurubewi.pdfIn PDF document text
    • http://canvangdientu.com/images/file/47231890348.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/iegcl0musl8j8e87j068oh95f3/jupaxajiratiwokoporebu.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/f5adee27ce962e05ce5453cde64bee23/48429730002.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/boluk.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/93484926124.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/62235784737.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/funixozapuwi.pdfIn PDF document text
    • http://congtydaihai.com/upload/files/90707357855.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/4aeeca7872bd638f207ab18e1b56c41d/60971543057.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/qg8t8qi374i6g5nq61de34oelk/54813022660.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/laxoxi.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a8e9cd16e---wowurunoxurokojulilufadig.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_off0000d9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D6 5144 bytes
SHA-256: 3bc792187f59a73f73965fc36ded8cd98cf08554f71bd7e63bbbc3d2242cfa3d
font_01_sfnt_off0000eb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5D 10660 bytes
SHA-256: f9c59bdcd39e53c92ef3a631721e309b29f4eee6bfdd08fe07b76b2d5e815ea1

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