Malicious PDF — malware analysis report

Static analysis result for SHA-256 09024dedda1379c6…

MALICIOUS

PDF

85.3 KB Created: 2021-09-03 04:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 469ea8fe60faeba9cfd17d84371eba22 SHA-1: 4ff9b5198d32a5c7d0bd9779251cd16b6d40070a SHA-256: 09024dedda1379c6313c5e06441e4cb643d4c447167032e3dd0ecf7b188ca35c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, a common tactic for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful content, likely as part of a phishing or SEO poisoning campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b36804ea80---fokifobipetiwenojajado.pdf In PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/67433557114.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/21043421503.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d974dc22c95---somojimoxopawupabitizefer.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8cd5f11d---97839443139.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/6903f7e20fb8ecca4acba62f5531b749/31841642517.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071dfa0f4040---89585068493.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/17758434215.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/zidaz.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/77468075328.pdfIn PDF document text
    • http://mobilenmr.com/files/files/tefawobaxadexugo.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/78905276462.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/mevunagewalipawemisu.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/96930000412.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210903_F6690F5063DB6322.pdfIn PDF document text
    • http://agama-rc.com/upload/files/xirejozawafokazat.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160d6bf17c918c---89857625409.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/09655fb3b9bb8f729f4def453e3ce20a/siwavazidi.pdfIn PDF document text
    • http://vvk-wiedermann.at/userfiles/file/jawekesowemosiso.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/9dcebfe4fbccec8372eecf89c1982f47/4059682735.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7013699a7---wanalef.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/92688884530.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=gathering+blue+chapter+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/4bfacf8c447af727df3473c836b54708/54890105027.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 10892 bytes
SHA-256: dbdacfc32645d2f1d1ccddf78a76bdcf51011510a12cc3c436e6621f24694cd9
font_01_sfnt_off0001034c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034C 17080 bytes
SHA-256: d113317e5844365b0e1643f9eab3cfc0358a9defbdfae8fd805ea3374dd2118d
font_02_sfnt_off00012f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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