Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f02cb71ec3f833…

MALICIOUS

PDF

75.7 KB Created: 2021-09-17 15:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d6363bfc9c861143229892b7ef503a48 SHA-1: 116bcff16e1a2fe97ecb163c7694f81a35717be0 SHA-256: 47f02cb71ec3f8338e0e675b63dcdcdf495ae7c2fb792812e449a9508ffbb0b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the structure suggests it functions as a link farm to lure victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137943a3d11e---vuvapitiwiwovapiwuv.pdf In PDF document text
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/2508616415.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/xuzupoda.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/tuzixowaxubikemupus.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/33f786aef10aa28c319180782375e2ab/4767832210.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/61395586abd67.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/xafokorani.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/72224352664.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/kaitu1bjr74k5dokq00l3m2l6v/taketemowupalotuwisosasa.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/1419602335613c5ede97996.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/31597557978.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021090613051247.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/709irkpv2qh9m0u64spfc0jpf6/ranelutuzag.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/50016508186.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109151400581283.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/dizawuwedan.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/59970326978.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/22110704968.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/57427291702.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/68269647144.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138e468b534d---fovegusupedogiwosof.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vuzofinebalivekivanarodep.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/17004867594.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/29570064675.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/razoxodonamaresifejeke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=principles+of+geotechnical+engineering+10th+editionPDF 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_off0000c26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26B 11076 bytes
SHA-256: 9fa910091080548a96b11fe26009a43fdbeeefb9e0d66eb5f44aed616a45162a
font_01_sfnt_off0000dbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF2 17088 bytes
SHA-256: ad3d1aaaff33432af3cf60d614c9aa0ee8dfabf12c9695312442e52ab991a29d
font_02_sfnt_off00010883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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