Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5cede5156d72ea…

MALICIOUS

PDF

86.2 KB Created: 2021-09-15 09:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4f5bdaf304cc8dbfd2fb89db32816af1 SHA-1: a0acd98e68116965e2d713e6de03117cc07207b7 SHA-256: 7a5cede5156d72ea47093a4e8ffb536b6183f10ac07505bc1225775060927c57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI links and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=minemaps+for+minecraft PDF link annotation
    • https://xn--interpeas-r6a.es/upload/files/66157132595.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/betomagoled.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/13565777687.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/43482558425.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/96996789754.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/45827010291.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16136b8015c422---nakenijukaxiden.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138966645412---xubezobewaw.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/zidawovuvom.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/71619134528.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d013d9b819d547ea603f239712e5a4d4/76195649100.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/burizolo.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/vemasa.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161414476546cd---6899526423.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130afed20713---94885536649.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/jugubemodidodip.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/sagofativujuxovibitolet.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-15/20210915142012372897.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/0e8b5344b64c994992fc44df0b2ad869/vozosad.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613990f85e86f---ragekajidetusifeka.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2bed26bf8---91298798297.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/26949832545.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/nirebumivagupeput.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/niruvudivugem.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_off0000ee41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 17372 bytes
SHA-256: 572750a8833eabbd902d9c49a9d3f62752a28d9ed560b05a9feeadab2407d310
font_01_sfnt_off00011b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13392 10588 bytes
SHA-256: d93e19c762318fc31301f42c1d599d02713128e340c3913a4e67ca9b106fca66

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