Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e3fd848bec0eec…

MALICIOUS

PDF

87.0 KB Created: 2021-07-01 23:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: dc11e8181ddcfe12f0fd0d220ea45bc3 SHA-1: 482ef7a59b47a4a3bc764346309cd675d31a61b6 SHA-256: 82e3fd848bec0eecf9bc91ae129496f28fc9f0d1fa934f0cf034d91e7a8a84d4
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. The file contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm or redirection mechanism to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to direct users to phishing sites or download further malicious payloads.

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 https://laborke.ru/uplcv?utm_term=buchanan+wicked+problems+in+design+thinking PDF link annotation
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/175c45c08524404cdaa0ced6a055bf1a/35235931221.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/31a6c6f0c6842ef1f0da7fb8e803ecf1/pinopemiwapaka.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/wufexezorotiw.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e42a3eba4---47412394035.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078fd7fa2cda---melagesixemuxiresifo.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/tfb7048p5u1rotguadbrjv8ou6/96040935637.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/90775089919.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076db55de2a1---vujawedomenozibezut.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/posenimolutobatafemoja.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/puxalukivakuvewatoteto.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/zelawejirofi.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/pebij.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/d2ur7otolugu62hqfmjcm7s4al/17787982051.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/ea6d2ec701590ec1e76f2f71108ae1e8/lepoterivopinizeb.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/7uqca3g1aglha6ocr9ujcn4454/87933721280.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/tajovepatutomun.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075d025cbbea---wenizezetevinexanivi.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160700a7eba5b2---7075693474.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/3600112637.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086619c597cd---78451782323.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/14493518730.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606c968905436---61898091322.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/fubifijabunivawirapa.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_off0000ee8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 11432 bytes
SHA-256: f1aaf4f2322fcde5bbf3cd92b77a38b8659d64f3b879a70366dd9db435d40bf0
font_01_sfnt_off000108fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001210c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210C 16892 bytes
SHA-256: 61d2ac81aeb3ca11e34f4997ca36afc988078985b5114de26b7f978318ed4c19

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