Malicious PDF — malware analysis report

Static analysis result for SHA-256 5242422c5414831e…

MALICIOUS

PDF

89.8 KB Created: 2021-08-18 11:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 92265ea6173d49ef844358f8e0e67be4 SHA-1: 6e4ce2b64142f63d5be929254f65a2b2df2aa4f3 SHA-256: 5242422c5414831ed7d3d67b98c3282ecf0e7f52a8eb1521573077a9587dda17
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress upload directories. This suggests the document is designed to redirect users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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 http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/0a945d494dd3883929272c4dababf80d/18861368189.pdf In PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/3b9rbl7peqvfus094uoo3ecch3/94763479835.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/wakimigodufudobizep.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/4697979408.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///87980122533.pdfIn PDF document text
    • http://rhondachem.com/d/files/sekegasekolugifagamu.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/85117455117.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/24898888901.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/fa81c5193eddb73b12589357ebd72203/xaves.pdfIn PDF document text
    • https://ego-sofa.tw/uploads//files/202108110417331269.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea0b982d0b---39679032803.pdfIn PDF document text
    • https://beruanglucu.com/contents//files/62097230323.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607507f5588b8---lodabupaja.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/30549554191.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/65362772352.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/bfa012986d0b2690e2c7539eccbedd66/vosipipi.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/jifexufojixano.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/84824327869.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/5362148836118a41b75322.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/1b6cd5fab2136f338178ed5782d10326/15176639846.pdfIn PDF document text
    • https://subarini.ro/mm/file/56192409418.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/bufukiximapa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+treat+severe+flat+footPDF 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_off0000fe8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8C 17356 bytes
SHA-256: defa403367cfeba09bdf19ec078a97274811b9aef068d8c726071b1415994ca4
font_01_sfnt_off00012bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD7 10152 bytes
SHA-256: 51ed483bf263739fef4a77037bc1c40b7059b02b1a748228acab3520d6547f23
font_02_sfnt_off000142c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.