Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad70032c39d3578…

MALICIOUS

PDF

79.4 KB Created: 2021-08-16 23:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b410813b2dd277fbe5050885e08796eb SHA-1: 9bcab818a4ba8930e0f0fb325428741d578b389d SHA-256: aad70032c39d3578a3c5cac4c6054576abf664415c079772c58589e0da648810
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=variable+dependiente+e+independiente+tesis+ejemplos PDF link annotation
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/f8edc3982546c61422a26a3288cf54a4/rirejumaxupa.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/95772921096.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/3451472875.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/78077066248.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076750ddea3e---kezize.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b5130372ac1---ziroginolub.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/178a4f2e472169079fafd7d2c8d59e51/levibovuwepub.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/68345835ab7f6c08255c4fb5158594b4/64495294621.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843f9e1d1bb---70245027698.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/62efb9cf21d9a9cc8b1b31318158ef12/32017526398.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/tijakeses.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/lupemipowoxejojelu.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/62ii3hhq8a1sbacc71tbrhpc16/luvawazodosalatuvejetu.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/wonatawelojomoroxap.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/97766534763.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/36820205690.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/2a005aaa275197e3aad7650ce4816d8c/68690749771.pdfIn PDF document text
    • http://gerocuki.hu/user/file/zubagefosajelez.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/a3f0bdd37331c61e5042aa66d0be5418/fipokaditiwunogonapuviz.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/3d334fe191c38e85f50fa615139ab207/96030633959.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/nizovob.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/7ffa96e746b144f2fd5289d1abdec5e1/jamiwugo.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/53449661331.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/lisajedi.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_off0000d35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35A 16084 bytes
SHA-256: d1e5ff64e5a60d34bfff19e5548d351801ea13d833a773f7fb34ecea56b59e6d
font_01_sfnt_off0000fbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001140a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140A 10792 bytes
SHA-256: c0422d42d3b207e404f5a1ec22c5ab2ab5ce1e320d993aeaf5c2e3c475f185d3

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