Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f430feffacfcb4…

MALICIOUS

PDF

86.8 KB Created: 2021-08-12 00:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d77ec826e27de61feaf1f147af529dd8 SHA-1: b6b7b6b9bf6d4e9ce86b3467d573fc8c3e79e1aa SHA-256: 05f430feffacfcb424e39365f47155fb9fb6010483feab1b8e545f59a398aeaa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates these links are on disposable hosting, suggesting an attempt to obscure the true malicious destination. No scripts were extracted, but the structure and heuristics strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1b4920151---notepiwa.pdf In PDF document text
    • https://brahmagnanam.org/fck_uploads/file/8745957418.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/71b4bb07d9ff76a693debccda69fd56f/94857468875.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/fewojokodimogok.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/iudml43n0mppfjfuhc3baud5qc/19291328039.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f2bb6ee2315---kivefopifumopajubunipusig.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c209e4b5c1c---rosemaxojadasotulowa.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/60749965555.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086c55737d7d---94547727860.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/wegegepukolafefatozi.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/14437028734.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/48799349673.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/7102cf1e50c9c78623799c84f9935763/41128911324.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/583264c683ebe034b1ef9f987bbf36ff/64166313337.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/0e2d7b669ffa8c9d6843b5c86f54385f/pebotigaxofola.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/24529805375.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/bijerezujunukonetunoko.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f8ff503eb34---65775943427.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e80e749731f---mubowepudazama.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/70352969442.pdfIn PDF document text
    • http://hi-techfiber.com/userfiles/file/devekodugemojaxozo.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/sefibolunibaxemifixoluz.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/mizidupizibukif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=american+megatrends+bios+asusPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001060f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060F 10888 bytes
SHA-256: 3e788306ba6641110ecf34001efac7d2d6ae99f81f6262bca018d14b5943ea6c
font_02_sfnt_off00011f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0A 17916 bytes
SHA-256: ad4b6c0aa1280d37b2a5347d021fa380977ba18a677bd5901140b25d648f6105

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