Malicious PDF — malware analysis report

Static analysis result for SHA-256 2235ed72f7a6dcd0…

MALICIOUS

PDF

90.9 KB Created: 2021-07-31 02:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6bb524b3a6dad955f92db15467debee8 SHA-1: b9957a67ba101ef7f1b9dd94fe55167b8a98203a SHA-256: 2235ed72f7a6dcd04064f895a3ab502c01d246b2336bdf7dfd16d3cbb27cb573
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of numerous links on disposable hosting and compromised CMS uploads reinforces the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/c83ebce5f896db4a06ae372f0ecf661e/jogibesifatiwav.pdf In PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/03fb7c889099a513fd4458d8b1d192dc/60065251887.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20370324671.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/soraretux.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/sb2uugu9cb5it0vh8p3bev3gnv/bogidunirawibisinogivogib.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/d154145d6190363387c6958c44dcdf8b/rotojizaxamowipa.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/734ca796adb6df7d02c14d91ced901b6/natesalekogasulofato.pdfIn PDF document text
    • https://ezokniga.com/uploads/file/2706785480.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/jifidakuwupe.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79a573ea89---xemakavosebobo.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/16e095cc39c787b625687b91050bbb3c/18515381305.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/posetibemepisinomazesa.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/38245660830.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/1cd16f7eb26be92897d069b25a669cfd/21898998006.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image//files/sotorifanizisuv.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/794bfd8e1af64d7295bd21f23ca9d543/misopemabovumapadi.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/8371539289.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608186fa1cdfb---tiwijipujeletebaxu.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b26bd7a0ff9---nulozegowijamipitewavonib.pdfIn PDF document text
    • http://tipiland.net/upload/file/31253123931.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/rijezu.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d5186ddc627---68240305505.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/rozokitarijopujulajiluf.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/gepeferudedemubuzol.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b76c007d7a---wapowewonumoborofit.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a6dfe8c1e---tidogakexoguputawud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=unkilled+mod+apk+unlimited+money+and+gold+free+downloadPDF 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_off0000fea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA4 17096 bytes
SHA-256: eb8c76c961703e778bef84740bfb0c57734e6aefd195eb667f0b10587e287d99
font_01_sfnt_off00012b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B24 11072 bytes
SHA-256: fd141ae2bd63fd601bf85cbbdc72d83405eea55fb99df15cd3d03ffa33dda342
font_02_sfnt_off000144bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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