Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c535490cca776c9…

MALICIOUS

PDF

68.4 KB Created: 2021-09-25 08:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1b3e3c34a36ee694158f1e4cbd49388f SHA-1: 822be969708fa5e5872dce8c968fbb55716edcde SHA-256: 5c535490cca776c9375a4424a55ed5919f320f0efb7043ea0ef70657d903d823
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm intended to host phishing content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ef8c04bc5---ximopixutuwawomusodol.pdf In PDF document text
    • https://5of7edwardstreet.com/assets/media/files/dodekefujidozawasugab.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/sotetedogiguxekukaxoko.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/27496740051.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/musujewewidopikive.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/423060fb6095bcffd4d7c1aeaa3005ca/wizujavabesajilevonaxomo.pdfIn PDF document text
    • http://border-collie.ru/sites/default/files/file/latizipefifevawo.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/30880344457.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/57287024851.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/wupitozoroxomopitesu.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/38834775354.pdfIn PDF document text
    • http://1666-3668.com/attach/userfiles/file/bevaro.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c3af4a5fa---jozutowamafiwodisemepe.pdfIn PDF document text
    • http://divorcefinance.nl/uploads/file/2243763205.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/32466442594.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/0t9odbrganf5lmj149756hbgr6srf3d1/35831936658.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/xulewemedakikuzujolufuw.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/patuxoxulazeta.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/nimizonir.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/milipakememekenivatonesam.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/49061662016.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/44566929630.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/50131012756.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=capcut+video+downloaderPDF 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_off0000aec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC4 14688 bytes
SHA-256: 44eb3cb0dd14c995482db28477e4565f275794e46e1861b1340bcf6ad86a9101
font_01_sfnt_off0000d3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A2 10620 bytes
SHA-256: d696da71a10570ec0ef15af96fd62f8b5b70e93d1aedae38ad9b8fdfedac7688
font_02_sfnt_off0000ec1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.