Malicious PDF — malware analysis report

Static analysis result for SHA-256 110d8d6988eac82a…

MALICIOUS

PDF

106.7 KB Created: 2021-07-13 22:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 79f5909adf913eb3d369b24bb978e3cc SHA-1: 3b336573b77b7a2ec63d8633a139b1c5a5c1425f SHA-256: 110d8d6988eac82a4e8f172586c8e3c2208fc2d1f6954893d0b48b4cec879775
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress installations or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/s1o7735r6vh0lfvjkme603g7kq/wogijumabomikafirigefaka.pdf In PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/s3hjv5dfnb1mk4tfnu3pgpfv83/ketarevulosupune.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/a55c11f028f9f4dc5348b1e8391ff067/dodetax.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/340f8342769d7c83a996fbd2ab70a428/fimasadewadexazodupujer.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/roponej.pdfIn PDF document text
    • http://e-hane.com/files/12776863152.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/gunoz.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/gojerilixuxakidudaso.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/21423197316.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b2217b621---6150971607.pdfIn PDF document text
    • http://charivne.info/images/file/wibefup.pdfIn PDF document text
    • https://laserbeautymachine.net/d/files/mesiwidetenadojatujipav.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608902fc078bd---ruroxaviwobotadefake.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/wamizi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c701a4381ac---98289681626.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b264e7545d0---72008376225.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160acd6502a269---binipoze.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607946d51e2c9---72553853705.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a449b0740ff---fuxedogevoduputo.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f71f3ec533---jaxulilakelutigakorulime.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/48274464953.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/gudebubemogafujuwazo.pdfIn PDF document text
    • https://stackovIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=alter+table+if+not+exists+postgresPDF 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_off00013ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000156b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156B6 17508 bytes
SHA-256: 7a93d8dabb831029d80a10d4f3769f3146c684575e547afbc652bfbf1ec5ac3d
font_02_sfnt_off000184bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184BC 10756 bytes
SHA-256: abc9feac9fc5663784c3bb5207c01dbeb141653936acf65b179f7d3b70a0a584