Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ccd024a96e2b65…

MALICIOUS

PDF

79.5 KB Created: 2021-09-06 00:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9934c79bcf9243c09df894d08eaec5b0 SHA-1: a1515c763aab782faca54e98539c27582c6cf206 SHA-256: e2ccd024a96e2b65e6e6bde8b0795050b00f7b12eec3705c58b40d27507b3ab0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress upload directories and other potentially disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to lure users to external sites.

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 http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/1j3krma9f0q52vmp89am765jo2/96001776889.pdf In PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/ccbbec97c6f5e4251985c04233147883/78797770848.pdfIn PDF document text
    • https://buka.ru/sadm_files/32430659580.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/c6d51eac50d55debcade90e4176895bf/vorinedizu.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c47fb699f85---40802627457.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/g0aseb7b3qh7rkt198ivhoo5a2/pugowubuloxasemex.pdfIn PDF document text
    • http://flemisterbauldingfamily.com/clients/8/82/82a21d9598fc66f9117a8fb7222c8fd0/File/69977112362.pdfIn PDF document text
    • http://mqskin.com/luutru/files/27625102542.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/zirasasewezufazowupegowe.pdfIn PDF document text
    • http://sualaptoplayngay.com/ImagesVA/file/virevuvegusuwuxowam.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/rubotarojipefa.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/dumovet.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/n467n6mag79k3bu8cltqbf9rm9/76625471705.pdfIn PDF document text
    • https://etadelloro.it/images/file/lenapeposaxoxasa.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/567bbd4bfeeca7cc66b74fac919a8860/vogobozisokujel.pdfIn PDF document text
    • https://paperland.bg/uploads/file/15694526874.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd6c0766d0---46115701779.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/nubetivikelaliludit.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210705_005114.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ec90c0b5a---dowonobup.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/livizebuxikugilewuzunumo.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/98285117102.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/mebevewak.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/30833606840.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160fe75fcaf3e1---wimuzugeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=converting+pdf+to+jpg+on+iphonePDF 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_off0000d231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD231 17652 bytes
SHA-256: f6487a492d4f2bac4ab65b4d3a640d14630728e07d5b566f9d3ea42f5de0ddae
font_01_sfnt_off0000ffc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D9 10628 bytes
SHA-256: ec8eb85270ce659737bb0fbb13758996932cde4e4a579c1a1e22d02d66dd1bff