Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7237f8753c43905…

MALICIOUS

PDF

76.6 KB Created: 2021-09-07 00:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 152e1010dbf274c1ab4437aba7d3a308 SHA-1: de8891eb27f53a95786cb0d23744a657bd35f89d SHA-256: e7237f8753c43905d8571e7ef355faaf4e8f3f42ea562283fda3c022c24b906b
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 WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://godswaynehemiahmbc.com/clients/878002/File/puratinivokogukojetalewav.pdf In PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4361157db6---kavibalujowovurinaresofat.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c92d5b7648---77259721349.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d3db5d0d5---29335775865.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/wanujisukugijivivu.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/baxoponor.pdfIn PDF document text
    • http://adice-area.com/pictures/files/25242059823.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f23469b27---wilap.pdfIn PDF document text
    • https://codecs.roimages/file/faxagipowamarepugonir.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/19542542107.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/45246437997.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/werukosidato.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/rlfreticfpq61s4s12mpa2qu48/3075598622.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/16244403945.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/xiverodenuj.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3d9ea0cf3---9261979970.pdfIn PDF document text
    • https://trieurodata.ro/images/file/46606089159.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/dc5c93ca2100cf3147bae62083da3a7e/firepa.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/tosozikamisu.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/11571370727.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606f309b093e9---fomavosolunirifubobasareb.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/20113632535.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=manual+de+comportamento+animal+pdfPDF 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_off0000c1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 19236 bytes
SHA-256: 3652b658d12854874071c3e7c10f12de6b589f05d6677bb60ffc4d36e315a606
font_02_sfnt_off00010aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA6 10704 bytes
SHA-256: bfb4cba0464514f8e5262e2260ca69096cf4a93d50dd3ff8b7ce978c91441132

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