Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c7f7e5b3bba9aa…

MALICIOUS

PDF

90.0 KB Created: 2021-06-29 21:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 637ece21186f1a3ebcc9779662a11e5d SHA-1: 2b65cf63314a2e09b1a338f74df4c8d9bfa9c705 SHA-256: 13c7f7e5b3bba9aaea1692cc88a0df7fce71a820c71a2963d999a5cebae26463
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crysiq.ru/uplcv?utm_term=is+cleft+chin+dominant PDF link annotation
    • http://mintaialuminum.com/d/files/minazebufujuva.pdfIn PDF document text
    • http://df-2.de/images/daten/file/pobavituxizexadujafo.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/356da64b7432e90690138419ef8ee7ab/fukudate.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/596c4ac5f27872cdd1c70d16d14f5a15/41622073703.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/kibulejinubenomozukovi.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160959bf2c02de---24923341445.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/7a5ffc1b1b45e0a4609260ce026378f2/nalotukibakap.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/61060345569.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/v1pib6r9acj1iuim05c46dk561/lalipaluko.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/muxebuvuvurij.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/5702115880.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16098ac48c18d4---lozabulitorurogot.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/93572822687.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae6b915dd4---notimavalimos.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f4fe8c3fc---vemudiraliwukon.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/27332f03ade98bc1f878c3a1cc62e470/83183276005.pdfIn PDF document text
    • http://xn--80an2aej.xn--p1ai/up/file/90003729345.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b362d0d0af7---32432808811.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/pujonitinidiwagokov.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/be8c0e431cdd9ee5ca047c63cfbcc302/96859679859.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a91b6f16221---lovasonimametipifipivifov.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a47cb6865abb5c7c08c9f8c996250430/kerijuxiw.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/a618b58c991086388e5086e58ef81c98/xezorodozelomemojoduvo.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/6416ce76505221684af433da84eb2058/gubupotinuwoxu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE60 17104 bytes
SHA-256: 67533e5d9dfcec4b0a3db2ce2557611a016a3c97ed91d4f954c8e79749674629
font_01_sfnt_off00012b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0B 10592 bytes
SHA-256: f4091dd2703e69a5133d9c837d710fb161792d80a43494f74291a6508542d2ea
font_02_sfnt_off00014304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14304 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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