Malicious PDF — malware analysis report

Static analysis result for SHA-256 806d10248bde75ca…

MALICIOUS

PDF

76.4 KB Created: 2021-09-09 06:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 128f0aeda1bd77ea1d720d13015dac2d SHA-1: 1d0d55f29c3e65faddbc540a36b241d9724bd4f9 SHA-256: 806d10248bde75ca494e62f79cad4cb79bd424422c68570ccfc3db57b47d2d4e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on disposable or compromised platforms, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://absolutelyneon.com/userfiles/file/pudutix.pdf In PDF document text
    • http://wish-pharma.com/upload/files/relinimikizun.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/duregurexopam.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/pizefetanexiv.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/11339927569.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/dezagajodidozavudisedij.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/84023173180.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/16255253013.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137addd2b847---zinuxosek.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/99599806921.pdfIn PDF document text
    • https://pokereshop.cz/data/file/36459253039.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/94893667177.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/47612106418.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/10283582385.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/berano.pdfIn PDF document text
    • http://bangtaisay.com/uploads/userfiles/file/lufenebenuzaju.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/1c10f0d5181ae359292a75ca9efc0e5c/vavumuzefi.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/sorakunumel.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/vixifaji.pdfIn PDF document text
    • http://huyminhplastic.com/upload/files/duvijupegoxisenatawefep.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/rimivopo.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/qggivvimgi1qsogda7k62u8r74/50081959979.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16137a7da7289f---mipemuzona.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/70106515099.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/wogip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=turboprop+flight+simulator+unlimited+moneyPDF 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_off0000c7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC3 11260 bytes
SHA-256: b2912fdb96a90d7d980579565420b0c767a4af15fa6c94a1535a6baef1b3e568
font_02_sfnt_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 16560 bytes
SHA-256: 0c3b9544d4e6a1ace90ace6ae4931d2f426d0a6f2d462c4e8142c94392924a82

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