Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebaf426d7e2b618…

MALICIOUS

PDF

88.2 KB Created: 2021-07-24 12:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 67dde58caeb1d8a20082b475ae74a84d SHA-1: c45a6ec39a18f62936174f5e124511c120b4decd SHA-256: 0ebaf426d7e2b6186d56d6848e9c410ff8f5365046961e3c3236f16afd804987
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO manipulation. The presence of multiple external URIs and link farm heuristics supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://klefmarken.se/upload/file/70297934012.pdf In PDF document text
    • http://pnmanagementsolutions.in/uploads/85800741229.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/xiviwebiwemeteriji.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/gezuzuvegokawifaf.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/8de9ab0b56b61438cda29fe3ab9c70cf/32980580933.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/5648055387.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c12b24d0bd1---lopezene.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/4029655471.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/8ab6dda9d38ed65baf6b8303e2feae34/874225978.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078b186539c3---gibudepevedafafirexazazu.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d52c7dba0ba---mudoxomo.pdfIn PDF document text
    • http://short-story.ru/upload/file/mudadutuwusago.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/zaxoweparerawidireduwoxa.pdfIn PDF document text
    • https://nestuby.com/userfiles/file/86867953855.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/cf3f718780e4bbe213cd8118b69e9e5f/kanovonejezelopixemo.pdfIn PDF document text
    • http://szwygs.com/upload/tikazuveto.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/jufisumivedozafalibesima.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/8d42c22480a48bfdd3e88dd846f03012/82934322869.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/d8d777fd1f32eadaf44a2c9fc0902940/mibelatefilavagodujik.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/7gr7qtblkeb4l84d8dfok3qkl5/vimopofaromusi.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/nonel.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608323a40a489---22174296920.pdfIn PDF document text
    • http://teplospectr.ru/images/files/60688119724.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=difference+between+b+class+and+c+class+ms+pipesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31F 10888 bytes
SHA-256: 8fcd2839759c7e54dd591a5ba980b5dadce33ccb66e116c268bf1dacb73ec0f6
font_01_sfnt_off00010c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001243a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243A 17404 bytes
SHA-256: 0ce5f30a4f374b27b82350706d9d68a56b4cc216f7257b2e8436310cc86c14c5

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