Malicious PDF — malware analysis report

Static analysis result for SHA-256 51eaba562481cd68…

MALICIOUS

PDF

115.7 KB Created: 2021-09-05 00:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 05124e2ac9ffd40d741782bdada06009 SHA-1: f006333945b3c05b54bc05846b97ef4e9db7e2d9 SHA-256: 51eaba562481cd683f4eed5f5a89171918424872448f889073f2fe53b1f693ff
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed for malicious purposes. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection attack.

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 http://tiga.co.th/ckfinder/userfiles/files/6265644791.pdf In PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fd499fc433d---virixakevoduxifelefumode.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/guzitarumele.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/89389116320.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/fogajakunorotol.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/kanarixu.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/fisolasezuledi.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/532ft1etk8r374an5rdeg1dsj2/pubosepudamorenunob.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210715_042326.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/7e5vt41n258k0d9cd30a284u7p/womelolulorazobep.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/5c6fee80569a2edf6c2944866c2ff8eb/juzokomodubebum.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/90116400590.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f638e529f---xulasoluwudasizid.pdfIn PDF document text
    • http://splogservice.ru/content/file/4171679476.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/9984956392.pdfIn PDF document text
    • http://alkanboya.com/files/file///gezulatefib.pdfIn PDF document text
    • https://anjingliar.com/contents//files/pilefinuxivegipatufus.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/benizovag.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/363f2ff75f293d0e66f07e3876e1546d/35793264766.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ade2fa354d4fdecf53a30ac7e26459cf/pogabosevofumuvogumej.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/ab146624d5d99e8a19cd49114df01008/21920316456.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/botewilulitad.pdfIn PDF document text
    • https://balustrady-metalik.pl/files/josejapikukemibi.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/92967163959.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/wajukorenazufuzunukebor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=ringo+ranger+manualPDF 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

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_off00015f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F3F 19072 bytes
SHA-256: 1a7f69fa29e5d168d152e504eecb8e2aae057c17039158ae312fb1c10e14c2d4
font_01_sfnt_off000191b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191B2 10328 bytes
SHA-256: 0f90434ebaf135e29881dc4ddd814ae7e342b434fc3c940118b8919c40100385
font_02_sfnt_off0001a8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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