Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98bc1ec0966648b…

MALICIOUS

PDF

72.2 KB Created: 2021-08-31 02:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 14d15317cffea0aa24a7e3fb10af2362 SHA-1: d31d74bd9fe35940f049e5229c85fbad5f6d2c2f SHA-256: b98bc1ec0966648b8cf43edc5527378fdd1ff9e83df3e2aed7162a32bf695487
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 sites or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary attack pattern involves directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://alarmy-kamery24.pl/userfiles/file/dazegurex.pdf In PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/7ef59da52b7109ca904849b77209a749/givapewugawowevikumom.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/77f6a043ab21946c08f3cb9d089addcd/91304219613.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/6943c3c3f1b50c9c2d3c6435b689701b/15637606545.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606f50a4a5f2f---kekojipetaresogim.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/bugijuru.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/2ui2b64hu6131e9mshi5m44k73/dapojevuna.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/wevozibutakawek.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/97495809278.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/dojurapupirege.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/gadhc2qv6ah5r6tgc2e38sm8m0/69692172441.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/39361262792.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a01bf9fcd5---varirinosebiwel.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/legokalox.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/bufet.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/78973409222be6f623e7f64badeef113/87344619710.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/6159073662e3b073fc333464e7095e5c/towevarevumisagaxutonediw.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f4138f2a2---76092579877.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/552fb2a35903732858e1987b70712a6f/sitakivagumazapipusigik.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/74396906282.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607513ce7c08e---gobozuwosodal.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/kilavizupetogogapojad.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/kavezibivebajajuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=design+your+dream+house+game+freePDF 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_off0000b942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB942 16132 bytes
SHA-256: d26a5717148fbf8f443cead049d7f7fb6b4386bdc25ab81be82733e8be8ec2e0
font_01_sfnt_off0000e24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24F 10872 bytes
SHA-256: d39fcb8fea5cf9aa193a3e8ac7813e03d0de401a537bef76346337a5cd45827b
font_02_sfnt_off0000fb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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