Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8acdf50637a54f7…

MALICIOUS

PDF

78.5 KB Created: 2021-06-27 18:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 198114374b3ce6c11560e49e03f519e8 SHA-1: 90c916af376b97a2bdb14150bca0a7552563da39 SHA-256: b8acdf50637a54f7bc25b195346827eae51b7c0707bd6207b4b4f85dc2284a75
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV detection. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely lead to phishing pages or serve as a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=spring+web+services+interview+questions PDF link annotation
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/1o6o8n0nilh5ee0lsvhbpsmdp1/jufub.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cce11b68032---37370095353.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/ete4ds7al24n41h06u3tp6djqp/57855999848.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/59941611763.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160963079458dc---rixotexemadizaveser.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/t46u5csjljv3agqp7lts4qa2ru/fiwapidivisagotega.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/2568dd3592192168da7b07c2d0e69cf2/64305372888.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/hs0otjcjqabru4co13gsqjp3f1/69188934263.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/59711cf4e1d15ba4bd1a703c9c6797ec/52712825747.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16078c9f72eae7---zobage.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/9e216fd879213df8bff53a337b5bd85c/5641417403.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021051921575973499.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0e16d89ff---wofutapofaga.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/35092337932.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/pafegewefide.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/rejufibubopap.pdfIn PDF document text
    • https://beaszemin.com/files/94202104863.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/61523648290.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c12988ef0d---kopuremeg.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160844878394ec---zujoboxokiwenu.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8ea17a64a---33995504264.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C6 16556 bytes
SHA-256: 47d3bfef6afa8e6960ab03ab8b5014afd27f5f098c4b77a04038cc141bb58d05
font_01_sfnt_off0000fbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDE 10956 bytes
SHA-256: 7c1158c3b5e73474e622def78bfcbe81de86261b46bf446ed0658c22d872cd60
font_02_sfnt_off000114ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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