Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e1c6a8f2d4ff53…

MALICIOUS

PDF

83.7 KB Created: 2021-06-27 05:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 09d44d33c50146e2a4ffe0453da61ed8 SHA-1: 46bd2f698fd3562231fe0cb951c915de1f114233 SHA-256: a2e1c6a8f2d4ff53904402aceaf1e3a8319dd28c1a5c47f6df33054f33e03db5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload directories, suggesting it's designed to host or redirect to malicious content. The presence of external URIs and the nature of the link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://chcial.ru/uplcv?utm_term=tram+to+meadowhall PDF link annotation
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fcad4fb18---96542747173.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/1f486efee7bb6edd6537e48f887ff363/56351337257.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bad891e6a3f---95052278430.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/91a9ac2d63db7cf1e8614167f7b76622/zaduvop.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4b2b50a06---64285888698.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/i11to9buoimmsrndqgdbqhvlgq/sunexurilomedivad.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/kazoredusevib.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0b8b76910---13581762224.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/eda7310f37109b2ee8924d1e8c64e2b2/14676126414.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/48366475765.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/sasowukegoneziwegufitabe.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4620b8eb47---65902927009.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/nikakegalalufaxamabuletud.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/31390619408.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/a27899f5f0f8bf3cdbcfae6977cbf67e/lerirowowejozexufale.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/43372972400.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/75ce8252916ff6dbe57cb40b92baae88/mibaxipenilewilupi.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/cg9obua2o3h59lk49oj0i7kig5/faroxulotavezelabufana.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/dasinukanebomagejodilub.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/2offuq1290q29cpu2ssm4fsnq5/53432036749.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3F 17464 bytes
SHA-256: 0440066f02878ed23b1f488050d531ca5119f0864d28bcf7cd9cb35730a0561f
font_02_sfnt_off00012b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B67 10196 bytes
SHA-256: 2834b0f08b7cdaaafe917eb6c7fd3375fa2ad5638c6b50840ec9f5cad6e377e2

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