Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c118a33f082cd5…

MALICIOUS

PDF

89.3 KB Created: 2021-07-05 17:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 90d05a1947ab9785da335f647be6eabd SHA-1: ca6d99c7dfd1b68bdff0cfebb1192b5c5d2a44c5 SHA-256: 49c118a33f082cd58840c4e11ac4eb098dc8ad33f84afa3a0ddd176c72aea14d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to leverage compromised infrastructure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://archism.ru/uplcv?utm_term=effects+of+peptic+ulcer PDF link annotation
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc592623586---46491794031.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b63061282e1---80290485156.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/95073681913.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6e582550b---83047508827.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/nopupatetakup.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/6868350b1bc5f7753b0d458e57e7db29/38868506747.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/58728490299.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c54e0f6bbd3c4a386cfbe34c0ad8448a/vufimaxexamojuloruvoleb.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/53723747043.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fd3974afa---ludilivoravixak.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607414a132808---miwiluviluvanujeropux.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/woxarariledixowalovu.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b0a7de156---56685852607.pdfIn PDF document text
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606e58202f40b---giriwifuwuk.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb05a4c231---21820481381.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/6lj5ipcrm9bje4e428pchtesb1/lebugewavuzumiwu.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a32cdad6f7b---bitodafagibavizotox.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ccd1e7d76---jegomigozodamerefobal.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/sutopivozuwinubetugadune.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/3029025ef291c1f141b9a999bced4ac6/87349001206.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/18060293796.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/66256631355.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/d61a4f5ae1e2aa333e102aedd71b9ef3/fesefopuxugumeropi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE615 17296 bytes
SHA-256: c3c22dda4fdbefab3fc23d81bbb0f92ecca514129962f42824268f665d2c3984
font_01_sfnt_off00011322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11322 16092 bytes
SHA-256: 98bcec2be85b547d266a48c61dccc50816b624367bf69e2f194f2b8087d010f5
font_02_sfnt_off00012864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12864 10292 bytes
SHA-256: 6c7b075e7629f4a58173ac960e180a19f62a3fde9e38f501ac5b9d2e146910d6
font_03_sfnt_off00013fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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