Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d8e2ad8876bf0a…

MALICIOUS

PDF

82.2 KB Created: 2021-09-18 12:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3b47fb08c3793b5ef9b8cb2fce8d55cf SHA-1: 3511fe1f9aa6cfae7fa1e0fcc3e01c06e92d0a6a SHA-256: 82d8e2ad8876bf0a91ff4f834933f7978ede73147d5952cd8d8cd65e798751f5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, with several heuristics indicating it functions as a link farm hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://stoka-saarlouis.de/userfiles/file/vogojupudodadunupit.pdf In PDF document text
    • http://babamoleskine.com/files/file/nejanebifanedasanok.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/giwatedufadana.pdfIn PDF document text
    • https://yogaspotny.com/userfiles/file/lepaj.pdfIn PDF document text
    • https://oreopay58.com/ckfinder/userfiles/files/pamizabirapilimex.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/kogutumum.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16140cbb767d0e---bukugelena.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/rulokepudukiwofedonotusik.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/vevik.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143606d51718---ragatufuwafidefisizokaf.pdfIn PDF document text
    • http://hoya889.com/upfile/files/20210914051356.pdfIn PDF document text
    • http://tcihk.com/userfiles/lusavogokijixusekijakobu.pdfIn PDF document text
    • https://2acontractor.it/images/file/xefaxuwifopaxobeno.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614455149476d---52261168583.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/rofonopofowamar.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/47424152810.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613839f7741f5---kesomole.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/39040206910.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/26318500120.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/75013716112.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/61796506027.pdfIn PDF document text
    • http://zapcdn.space/web/img/podborky/files/xevijujapivup.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135d1daa508d---podakulazomazi.pdfIn PDF document text
    • http://didopack.com/files/61451068700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=below+her+mouth+full+online+freePDF 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_off0000dbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 18520 bytes
SHA-256: cdbf783e35c83e589c97179f79f5efee33692af77dec540734b591c2693a8444
font_02_sfnt_off0001240e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240E 10388 bytes
SHA-256: fbf6204c612f86a4ceb5fc6a875944cfda7bc52de43811393f3540d762ab790a

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