Malicious PDF — malware analysis report

Static analysis result for SHA-256 365012678885da60…

MALICIOUS

PDF

83.7 KB Created: 2021-07-19 10:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6c9665b99cb4ef35b509f5be95a6801f SHA-1: f18d6ad8c1eb025912419fa57b4cf1a493c76d13 SHA-256: 365012678885da60c7b361a408bf256cfb55ffe0259e22f69169a35517b86fe7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/2f71eb991ce91d5f90a9a1298d55c7a7/wepavokela.pdf In PDF document text
    • http://thaide.org/userfiles/file/nipebepaxaxu.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/53617282638.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/18220308853.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/460rj95dnfn7r82762neus7qfv/xolakodu.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/mozitopaz.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/ovhlkq578g0dbg1dh3oh6q6c1o/rukuvinibesu.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7d2c74f6d---muxarafidipemekuvopepej.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6bfc41a5e1a43d3bb7c2ace840d3729f/vijatulafukikeruba.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607192ea23170---robaranumoreregufitel.pdfIn PDF document text
    • https://longhoang.vn/upload/files/68813011894.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/52037439161.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081421c074f5---19397133427.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/rtsda6dlbnhpsc9f85n0d90von/49531341914.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce4ece4550---nogurazatejekapulutowuzef.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ede96f16891---kixugobixe.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/giwojuvukefafuregowubuda.pdfIn PDF document text
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/xoloxoresafesamebe.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e9452832ea4---11735456522.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607495614519c---54290883652.pdfIn PDF document text
    • http://auchli-appenzeller.ch/userfiles/files/fokakodu.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879007ca42c---loseruxuvuluberavudu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=male+hairline+recedingPDF 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

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_off0000e609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE609 10256 bytes
SHA-256: dc30d5ddcc709fd396d4621a1952f6a2305a5276e13cf347bd5984492ef99d9f
font_01_sfnt_off0000fcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CB 17324 bytes
SHA-256: b8b4e0491aef9c456e3d0929e67d06d35d41c519a3deb2f2c000d2d432124d6b

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