Malicious PDF — malware analysis report

Static analysis result for SHA-256 df318715f8782f6c…

MALICIOUS

PDF

84.5 KB Created: 2021-07-15 21:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba19ce6fe5e44a648bf9c47b1fb55334 SHA-1: 8fdd88d550310fb08d755032dff30b14dda29de1 SHA-256: df318715f8782f6c226c4b2495e530622aade93c8c4ebc47eaa204bf7c504468
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. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the PDF structure indicate an attempt to exploit users through deceptive links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://huntic.ru/uplcv?utm_term=current+electricity+problems+pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608c440b569d1---98888855681.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16081bf405dab5---41968593319.pdf
    • http://dobrejaja.com/Upload/file/39189489146.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d23c7c569d.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2b752ce12---zowim.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6c8758623---39333895105.pdf
    • https://armagedonspedycja.pl/files/file/37280411411.pdf
    • http://planao.com/ckfinder/userfiles/files/30058752864.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/c821828f886da4cfadefd0779d292008/temijavinadigubazomave.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607018de78af6---momikubebexojo.pdf
    • http://infinity-pro.ru/userfiles/file/kubaxazifor.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607455515c25a---sutogowaselulilosupap.pdf
    • http://m2mus.pro/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/botekeletafitodod.pdf
    • http://drukarnia-skawina.pl/app/webroot/media/files/suvisa.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608748994dee6---52312481474.pdf
    • https://digireg.es/upload/sakiwezani.pdf
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1625600965.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080e1be70abd---48573142378.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ca650ba1042c33c5fa3a8613385ba23d/gogedemi.pdf
    • http://anpo.vn/upload/files/zujupobidune.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608150baed735---nefatutikegoniladotabad.pdf
    • http://dietaltop.com/userfiles/files/kapajer.pdf
    • 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_off0000e83b.bin
795adab7606aec041b6cf958c393488bc9233654dcc8695103a84b94892ec257
pdf-font-stream PDF embedded font (sfnt) at offset 0xE83B 16624 bytes
font_01_sfnt_off00011386.bin
91682afffecf59fe5fb5226333739522c8689c4a33d59da3fcc68af35f7f0e3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11386 11004 bytes
font_02_sfnt_off00012cde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDE 16792 bytes