Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c179637a482c440…

MALICIOUS

PDF

97.6 KB Created: 2021-08-10 03:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e77149b9ee7f615955abc883c66d73ea SHA-1: bb549b98b97c245d3cdaad6625cdfb8b00c7bbb8 SHA-256: 1c179637a482c440ba6bebaeae616b7bfd65b8188fa9cb0ad852d01a9bf681c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed to redirect users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports maliciousness. The primary attack pattern involves luring users through these links, potentially leading to further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wardwrightself.com/clients/863644/File/89219073872.pdf In PDF document text
    • https://bajrahrs.com/userfiles/file/15473485930.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/dipisefukokav.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/7416417d596a9076642231b145318602/4178225441.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e167d1e351---bufefekubufubezoverekilap.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/69fa4e75aeaa0f7afa5b0428490c5a3f/sulelil.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/35bdb14589bd37f9e1c4a089a0a15ed3/sasape.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/6940102c56071872f0893050b3d02f72/misujegasezitutozumaluf.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608769982731f---rujugawazuz.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/kumogevovaxupesidoref.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d82c63f1f5---rezapivaso.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608402264c59c---xafaxonakebugebefive.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160f7166ade8a3---nugebiwusi.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/rumozuj.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/58773611667.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/sekoposipapofuguzik.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/23283552105.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/26995260e5ee9aa52d366783280f64b7/dobetepeperenuta.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/d69a79e75d97be04c67193bd6ca1164d/2793145978.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/totepalugitu.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/metojiguregaturovipave.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/gozisurabupire.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/somaxuxovarigejilafep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+look+up+license+plates+in+michiganPDF 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_off00011aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA9 16964 bytes
SHA-256: 806e02a5dec63d8a360894a205e925a95225e7a5d3189e6faae5bb6b8518a593
font_01_sfnt_off00014716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14716 10988 bytes
SHA-256: 227b7087f55ae942653da2736aaeb973a22d202495f2be934b547dac5063008f
font_02_sfnt_off00016076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16076 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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