Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dc228349be2405…

MALICIOUS

PDF

82.6 KB Created: 2021-08-18 04:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: de426baca4d6563da85c9955cc00bad1 SHA-1: 422f21950f025cd39eeffbb9bc3bb2ce6ea51f3c SHA-256: d0dc228349be24056e3cdc37a3e022e72c91b881ada2cdb111b19c9a0a04a0e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or SEO manipulation tactic. One URL, http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072564c290af---92076693361.pdf, is specifically flagged as a compromised upload storage location. While no scripts were explicitly extracted, the nature of the links and the 'link farm' heuristic suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072564c290af---92076693361.pdf In PDF document text
    • https://fond.ru/userfiles/file/27700053117.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/xuvudisomo.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/kofimumixujosekebu.pdfIn PDF document text
    • http://health-bridge.in/upload/file/vagokiguwajuromoxofenozap.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/e65dced4ea40bbd13bcc60db427e8705/nubatapulifemizomi.pdfIn PDF document text
    • http://ks-system.co.uk/ckfinder/userfiles/files/molagopadikisip.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/rebuxarikakepokuvex.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/kanunuginijorekep.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/15809985765.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/36697012243.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a30f15d129b---nikamet.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bd68a8867---moluvurokarunedukato.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/5969e2db4dd83816f27b9d53f3f3e42d/lavamajujugapusotonavin.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e389e871b9---36450399022.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/81175554711.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/76750889328.pdfIn PDF document text
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/dezadexuzagufumigedufu.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/65946170075.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/73655365316.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966030ef9c2---nupaxome.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/35805131449.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/84733051646.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/1oaqpgtj3ngur3uvoo5f5fchhl/wopokopuwewalutika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sap+design+studio+vs+lumiraPDF 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_off0000de39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE39 16644 bytes
SHA-256: 11b4759ab45fbae23f396bd33c13f7cd38a9e2e5393bc6bdb8d139fff2d7c30e
font_01_sfnt_off000108fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FB 10976 bytes
SHA-256: 2f75b90722b4b7be133c6dad7e6a2e72d9bb113b6fe81d5bf63ab9ef9ff88d26
font_02_sfnt_off0001223b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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