Malicious PDF — malware analysis report

Static analysis result for SHA-256 61549be92d3d4995…

MALICIOUS

PDF

93.0 KB Created: 2021-09-08 09:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cd5193852acd7201a0438e56e4e5ca03 SHA-1: 120aa584aac4aa82d57e0f7a18d7d4f37ff5b5b5 SHA-256: 61549be92d3d499500862b9bc792c040ef5c4e718ccf92b9a2014584cbcc09e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://philabc.ru/uplcv?utm_term=%C3%A9valuation+diagnostique+tronc+commun+fran%C3%A7ais+pdf PDF link annotation
    • https://gplacestracker.com/userfiles/file/46839849444.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d08d39b19a7---2936302105.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b8440ff90---jugeluxatuso.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/12516147123.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/75671351313.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/padefofavubakegetetejezi.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/vifosimamesokaberigan.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/mokimasijoja.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/2478644042.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///94678150209.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/8o00mpvt1dgv7mkcvsihc2dgmi/16020427690.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b99e06280---lekonodoxiwewe.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/4955881438.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/fejadobakamobaputa.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/biwavumusibiribetaked.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/genegabunitejotekezaja.pdfIn PDF document text
    • http://moda-minulosti.cz/docs/momin/file/tufiviputiju.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/pamizabebu.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/tunidenasatame.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/52bsua86gr6rhhs072tmbtakd1/befawo.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/45738715178.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_off0000fd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001152a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152A 11472 bytes
SHA-256: 3a54d596b3f385541d90df116e6f44e1c86ebe57c5b95e50cecb033b53d4c483
font_02_sfnt_off00012f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F79 20884 bytes
SHA-256: d4bee1c0a6b0176659f261456ed0da7c4f5589eb12c26b881624b67d89c4f0a6