Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb3c9dfc8b285a3…

MALICIOUS

PDF

87.4 KB Created: 2021-06-30 12:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7a730db5b0fb253febdb54956aed69a0 SHA-1: 5499b19a3fc9c1de6931d4532273a28415e78872 SHA-256: abb3c9dfc8b285a3b13514aca38018cc1f8aa9e81416410a1968d2d08c908677
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable, but the presence of these link farms strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://fonnepal.org/userfiles/file/35245919744.pdf In PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/e3udrfjqi5km3h11a862hvmrs9/92581773148.pdfIn PDF document text
    • https://nevisnews.com/userfiles/74304814869.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/8bb87634a3fab1b8b2a7d307fac62652/zuwujufakufonozovarugepan.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/29972606520.pdfIn PDF document text
    • https://shibbirs.com/media/files/66609188465.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160aa63c402f9e---30711936537.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/xufalevum.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070073d23a5b---27190788667.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/ea329d7016b0d08fe6177468934ad5df/42266856181.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/20503807289.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/220pigu2s409b9fmgu9r2r4cdk/25817297090.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d42e79ec7d---94497740181.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8baded103---49701303105.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090c81d25e6e---lafobonakugarob.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/muworedebasib.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/s89kv08r4o7er98fng1bvqnjpf/lekotelepizibuwel.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d86f306681---18652991277.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/b8d59704c0703100d32e5c476cbdf619/19245191478.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/basexedegi.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/mitumunidadafuwisowitata.pdfIn PDF document text
    • https://subarini.ro/mm/file/mafatulobesazanem.pdfIn PDF document text
    • https://serka.com/serka/upload/files/nirudebivadadojipapid.pdfIn PDF document text
    • http://bwc.lt/i/87592123315.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/rixutapilopopugulokarijaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=4.5+in+circumference+to+diameterPDF 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_off0000edb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 18788 bytes
SHA-256: bee5b110e3ac6987e4fec3df8c43511cd4c6e46cc098992b0ed4f76b0f70a7ab
font_01_sfnt_off00011f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7C 10704 bytes
SHA-256: 9966d8bc785daf6a57504835b7ed0616bce5ddd117e7b2d629d9bd653e64946d
font_02_sfnt_off00013818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1