Malicious PDF — malware analysis report

Static analysis result for SHA-256 3079a8404c384e41…

MALICIOUS

PDF

100.9 KB Created: 2021-08-31 15:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5d2be5b63f2d2176fb78cb62351b310a SHA-1: b02f3fb0bcf3c320464ae1f8526ee638af9e7250 SHA-256: 3079a8404c384e410e8dbe790988f6e5ad2a053cc6c55a7a18cef7b6a55d5b5d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/972556981ff2fb73da816b680d3251f9/bonasozomarexenivoruxol.pdf In PDF document text
    • https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/masivareridofobidalesekan.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/24624497696.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/bawuzemoxi.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081c184c1d75---53852120909.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0799232393---1258967871.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb725924315---zadokewudugopi.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/wapozesewimo.pdfIn PDF document text
    • https://mimpishiodua.com/contents//files/47260112671.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bf292cd6a9c---rivajazotuw.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/34469617779.pdfPDF link annotation
    • http://al-bandak.com/userfiles/file/83972990018.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/5538727352.pdfIn PDF document text
    • http://lovellreunion.com/clients/4/42/420738e4954c29d3cfd02fdb1bc9139f/File/bopujigana.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/d8c50d15a6abdf881c1f3320473cc1e7/18351119943.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/e3f2d98ca77cbf04c9f14d3251ee2b1d/wujeroresotesapugibo.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/nowowamu.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/161280dd156d4e---79299376623.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a367e858e---votoson.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160769f48b2728---jogolabimovamewan.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8bbd58c39---poded.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/5hpkd3j2gpalfp9qmlun1pgqbd/36688158152.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/9215d4bc534b8123c13d5d22daefa550/pokadabixupidolatokafipux.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/16815248582.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/10767003606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=meaning+of+appropriationPDF 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_off000125fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FC 18736 bytes
SHA-256: a808dc4ab60c0879a05c7414bac68be5a6fd664f13d9475403b7ba8fc56cddab
font_01_sfnt_off000156d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156D6 10312 bytes
SHA-256: 85051d3504350184d31d7854120b4f5a4c19db0db95e1f7d816668b76e299097
font_02_sfnt_off00016e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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