Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9ca221c355623e…

MALICIOUS

PDF

80.3 KB Created: 2021-07-06 20:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 339418926542f5fabf6745856f61fc5a SHA-1: cbc2097d312b5747678f4c5d13071b344f7b597b SHA-256: 1e9ca221c355623e7e43c00f3c957becfe6b1640aab4746a9678f14a54b93526
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to domains associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript may be used to further obfuscate the malicious links or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/5aea12852058bc957b1d750b690c9f59/17627831885.pdf In PDF document text
    • http://npas.ru/pic/file/12479267077.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/47768553555.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/4748552789.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/37782142891.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/89342605223.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/vujimat.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/e0f359833feaf8ad3c789b9a0faf1eaf/82513848236.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/dc696aed621c4b626ec201a93dbf673c/75761253545.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/44b744453c3201bb45e9dcefd73e428d/kudilikusagavimizipape.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/f6500d8f90bb20bc2b7f0d1270d7e1c5/dolukivafevuwugimotowi.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/7b297b265b80c403d50bbcb452d3d51f/bigefijodafidaf.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/g3jq3fmjh4iommu91u1nia9485/98422001396.pdfIn PDF document text
    • http://babamoleskine.com/files/file/44126861575.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/14lrvqc779pl3ovp3etg93lg6s/6094233172.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85f0d9e74b---katepowomiburetupelomujet.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b58d66d789f---bopezawimunogubudizig.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/jivusu.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/zenusutivefeg.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075407a73dee---feseto.pdfIn PDF document text
    • http://mhs69indians.com/clients/864804/File/fuganamajevidokasi.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/12cvkg1o3lh04d9qirh0fdnl6t/57281663502.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/51c5ff9b17b6129700bdcae7c82a4f4d/wopobula.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=four+of+twoPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/b7c1b8f6f4861541430290c4e3d6a0f0/desilikonalejewusonuvusa.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_off0000d97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97C 9664 bytes
SHA-256: 42edb40ff6b4c6311626adb203ffdb81fcf71923ed78cd498e08773fd48ceaad
font_01_sfnt_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 17312 bytes
SHA-256: 39fa26ec4ebf58a521af1da0827e67ca2bd5ca2af927d47e8cdb7064fa107091
font_02_sfnt_off00011c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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