Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c9830532199a3f…

MALICIOUS

PDF

167.2 KB Created: 2021-07-29 21:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bcecc95d451fec4eb788468e48c8b745 SHA-1: 27b55d63cdb13fdccee28446f3bac1918d22ca95 SHA-256: 11c9830532199a3f824f71057b7cab155f0728ae9becd1ba918a142488c10f6c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of these links and the overall structure indicate a likely attempt to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://laborke.ru/uplcv?utm_term=dr+strangelove+imdb+parents+guide PDF link annotation
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/82bf0b72f452ea600f582c6f2e0917ee/65322278209.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/biluforiverejogol.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79ead25761---zopowikefabeporumone.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/0e07c9d6f89233b24e87deeb1c05b95e/gukukebobipuxunedadap.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/20943892585.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160872ebe65707---31803782170.pdfIn PDF document text
    • https://adikketiga.com/contents//files/14068971448.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-1/20210501153053906285.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a1ac95f63---83921893949.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160790f8cba7ac---75729850179.pdfIn PDF document text
    • http://cezanart.com/userfiles/file/81640931355.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/31ad0abf8e4d93021a4a857d8cbad615/59741714105.pdfIn PDF document text
    • https://najarshi.com/basefile/najarshicom/files/basufuzovidamuxunenise.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/68746406099.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/83973436281.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac78c711831---88381112342.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/rusukogamobake.pdfIn PDF document text
    • http://hevolta.com/upload/file/16583043700.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/nkjofu7004pa48r2cnevupna01/44904555878.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/a7pct99naef56hudfhhprv8r70/xovikedu.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae54c661fc---ruzof.pdfIn PDF document text
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/92880025418.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_off00022c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C09 18400 bytes
SHA-256: 7d88228a458425a4f2e666337a617a6fa7566f3490ac13f9a2adcdce45a0119d
font_01_sfnt_off00025ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25CE7 11040 bytes
SHA-256: 00ced0af2775c6574eeae41d0b9f6a1219c9ebc39922f2a3bc6c145ca2b5823a
font_02_sfnt_off0002762a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2762A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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