Malicious PDF — malware analysis report

Static analysis result for SHA-256 582e575a03c3aa74…

MALICIOUS

PDF

87.0 KB Created: 2021-09-06 18:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f68df0db4d7082ed68ff507f22c0bdc7 SHA-1: abb1f1b0fc126f8efadcd04833cf9bab2226a700 SHA-256: 582e575a03c3aa74d112ab790d2463b3a35f7e112bb143f3295e94ef8fc88878
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable, so the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/5de368af246cc0e86384de5d590719c6/zepakifisuwubekabutazipom.pdf In PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/derutajagevanuxovugot.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/63796195730.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/2a9284586204dfc0cc3e14b699a9f589/foruzirulepuwutonipiso.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160821b078b972---39264053094.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/360d296260d81aae8eef5949ed79af7c/22743596454.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/95420480417.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/22af11ddc3107de3dbc5c555c05afd57/33092250701.pdfIn PDF document text
    • https://mkserwis.pl/userfiles/file/fajoxeji.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3aeb9f3eb---44431014229.pdfIn PDF document text
    • http://byecook.com/ckupload/files/zeduvupizodelisupama.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/puzigodukoropolimazora.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/fefademofeserekit.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/8d125ca70bb376e8194ba80b9ba0e12b/72023049154.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/69214004453.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081467eeca36---wiluwuneweliginikoj.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/lojonubetakuxibumag.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608518121d224---dipewuxedapo.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/a6e6054131682788a6906a3315b5d908/82228059764.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/joligi.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085b40a7ccc9---tijobuvudozumopaf.pdfIn PDF document text
    • http://screen.by/images/file/63139583070.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/dimutaridalelazavav.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074aa5f3f944---sidoratilenizam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=trichophyton+mentagrophytes+adalah+pdfPDF 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_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 18464 bytes
SHA-256: 8acc03f4a75a5d37516829528e1ce2f727c2ab0ccacb72ac01b13974e6e3a73d
font_01_sfnt_off00011c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1D 11144 bytes
SHA-256: 9f0fd52e52038947e1739b88b0ff980f411e8f9ea8a67d7e8b251ce5df816ce8
font_02_sfnt_off000135c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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