Malicious PDF — malware analysis report

Static analysis result for SHA-256 066e6bead8d0e16d…

MALICIOUS

PDF

89.3 KB Created: 2021-07-25 20:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fe8cb1d1a642ebbbeb921f2ecf9d65e7 SHA-1: 74062fdd2f5a9d2a59f4df22b5d2987bb6d31f1c SHA-256: 066e6bead8d0e16dcfae650b26b3c389fdf4109e8533bc012a45192987a0168b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links pointing to other PDF files hosted on various domains, many of which appear to be compromised WordPress upload directories. This structure is characteristic of a link farm used to distribute malicious content or conduct phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://vieclamxaydung24h.com/upload/files/ralipepito.pdf In PDF document text
    • https://eqonetech.com/upload/userfiles/files/35048978975.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/mugagiwijifetazanowozo.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/renetatuzofimividelo.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1830c094a1d3e6945cdd385766618de3/nakorut.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/352c20c4ad4f6f73960e45d9a2452360/95964178783.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/9a6491cefb0cc4f14a0da0b647b93614/97298987927.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/07571a637b4f4ccfe2f8d60da30f694d/jusafazi.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/38238011992.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/bb2b757d26057963010696f15865fa7e/tisepotebewixumoxugogimu.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/lunudugakerebutukewe.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607161a9e27eb---2331653309.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16090d5ff74121---nitibilux.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/tanunonesi.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/kibirixadu.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160824b263831e---77153681675.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/1779560041.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/h0j0lrgni0enaplddfp3gkvgep/38028909768.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/a458d29fd7d35478d269f9f1d670cbe5/xuxufukigakumapopu.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/65210ad80eeee728f536b498d32c91e8/21628725927.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/31220827563.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/jemexukosijanexexilo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=what+is+a+fragmented+sentencePDF 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_off0000fafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFA 10752 bytes
SHA-256: 3f870366490dd7b1bdf4f3617eb59450d5b346df8d140ef84a2f764bec0c71aa
font_01_sfnt_off00011354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11354 17132 bytes
SHA-256: f1e12e691447eb920f87495f3fcfcd8c125abd5b627b93b8881a454623254170
font_02_sfnt_off00013fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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