Malicious PDF — malware analysis report

Static analysis result for SHA-256 182894dbad65b2b6…

MALICIOUS

PDF

83.1 KB Created: 2021-06-26 03:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d9a667aa2926687c814b54769403f486 SHA-1: 3f6f04d4d7c6c7ccfb5560edccbfd6c73ae1fff1 SHA-256: 182894dbad65b2b644f6780dc567465fe2b3833b62991e9a1cbf958128b9d2ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious destinations. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c14c1c0ce---bidufapurakip.pdf
    • http://bilmatbasim.com/userfiles/file/37117120563.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/i6okveiurgmeh4rho0tcoiqsj2/finanuwurajekeworisegir.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072bf30e3915---68016121445.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094bec173ed5---12754397219.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/3fc19c4a84d7b93baa1d261df4e11496/nuzatofaluza.pdf
    • https://anthonygillant.com/userfiles/file/zowejeli.pdf
    • http://ampletrekking.com/userfiles/file/48529345651.pdf
    • https://nutricount.cz/UserFiles/File/81626835301.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a23fd588e30---xiwiv.pdf
    • http://www.knickmeier.net/images/pageimg/file/misusakateriwufubej.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab889ba931---65326707577.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/e3c66f99f45e3ea10110e9ff617553ae/zigunisido.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/fcef37b09f993e4a08cf1573aa9559f6/tixunuwojibabaximevuw.pdf
    • http://autoset66.ru/admin/ckfinder/userfiles/files/84620584582.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f7f29728f---bezidaveva.pdf
    • https://dansobentre.net/uploads/file/ginasif.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ba4fb1ad657---radolumulimoguxed.pdf
    • https://iqmuseum.mn/uploads/files/83951590873.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-5-1/20210501050850223208.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/l1e78mkbqis4l8osoqn630apj6/32423055177.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53f535948c---nokofurozonuvuvuw.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d01bd955c1---kotusuzozora.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/0vjkobqis0n8pehdrs8ekjcqr4/kasetitisiwuwulurasenabef.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/75a54760adf973077d7babe16ef7b0bc/45433616812.pdf
    • http://amadpich.com/userfiles/file/wunarolebugonaturavawevuf.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=ralph+mctell+chords
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e225.bin
a586b6c8c21d864b31e88482493dc2771b643bb8a7cb6ebe8dfbf0d8eebb7a01
pdf-font-stream PDF embedded font (sfnt) at offset 0xE225 10628 bytes
font_01_sfnt_off0000fa83.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA83 16792 bytes
font_02_sfnt_off00011295.bin
b2ef9ca5247ea5c6369ae1e03594547beeb0d74f6836469a25a1e8c1281f5117
pdf-font-stream PDF embedded font (sfnt) at offset 0x11295 16868 bytes