Malicious PDF — malware analysis report

Static analysis result for SHA-256 068541126a60162a…

MALICIOUS

PDF

132.0 KB Created: 2021-06-12 18:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6e992972cc7a8873d24da4cac934a0a6 SHA-1: 68e85817e5b3b7e41c8c04c660944deb1a74d8e6 SHA-256: 068541126a60162a95d98d50acc47b7c17cb875218bf23351ef29daf397507aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains references to 'Bollywood workout songs download' and 'wkhtmltopdf', which likely serve as lures to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=bollywood+workout+songs+download PDF link annotation
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b479c1df1533395ef1f1c6e11ce80447/46006791813.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a176ac2d4e1---75685662161.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/fed8dd45d23265997fcdf7da83814163/69063643554.pdfIn PDF document text
    • https://stopserv.ru/files/file/35808244357.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/xatidekosokux.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/tafunosazilepuzonebuler.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/63814601031.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f149beed08---fadubodaxeraxapavowok.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/9627a54117f76c6c435fc46f3b06d28e/95035898286.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607650eb7336e---nawoxunavala.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f340179ec0---kofofetufimakawabuxi.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/29261573f68ab2ae71b089075bfbca21/vefoletevusotewikabi.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/jifaxetowaf.pdfIn PDF document text
    • https://master-service.ro/images/file/35125585297.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c668697cf---54279609550.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/8bb3ef795d9c936c33c4ab4f56f2a032/95564553975.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/jidilexaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC9F 5300 bytes
SHA-256: 3a2bb67c5c289d3e0b8d7ae835b60e0261a9eb814e888830bdc33c03d0e5b6cf
font_01_sfnt_off0001ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DED4 10996 bytes
SHA-256: 2bd09c15bd0d534273dc0edcd4e5ad7c1d14b80bc4966c642af8991b41e17d44