Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83dad577b39a3a7…

MALICIOUS

PDF

78.2 KB Created: 2021-09-18 21:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c59ae37af2b230fa8a26158b77814112 SHA-1: ac3d1e16961d2142f080848ad9a2e3617b786f5b SHA-256: e83dad577b39a3a7e4fe70244e19c45aa9d6542007204b69462727264226eb81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://philabc.ru/uplcv?utm_term=minecraft+free+install+in+android PDF link annotation
    • https://radiosmile.hu/upload/file/50873019053.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/92542566353.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/80478359438.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/7904687900.pdfIn PDF document text
    • http://shopabrang.com/images/files/89307087467.pdfIn PDF document text
    • http://klemanpince.hu/files/file/30199208682.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/bamuvoda.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109012231021955.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/guzajipofumowarako.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/92503827494.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/7f8b3c9de3443fe2f1f1574edac1f355/zamoninikeg.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/gagorefofi.pdfIn PDF document text
    • http://vp-dmsh.ru/admin/ckfinder/userfiles/files/37441876715.pdfIn PDF document text
    • http://elitk.ru/_files/84459702548.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/vugabozetorusisivudo.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/847e340a5ffd43d17481b406c729aa2d/tebejelogegaputibano.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/30773896663.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/99853744237.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/89520860041.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/b9od639negebrs1q7bgpl58itf/97972875409.pdfIn PDF document text
    • http://lg-palette.com/upload/files/61693364226.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8a5546d18---tixorufovopakixoxawono.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/jinenata.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/tapubiwuxovipuduwe.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/razajutofotoxajofib.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161430644ce13e---nexemodadefumuxixufalowi.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_off0000cf34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF34 17040 bytes
SHA-256: df6abeb271184fd3e0cc6bfe5a399752cf0d13c197d636571715fc68c4d9d7c1
font_01_sfnt_off0000faf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF1 10460 bytes
SHA-256: c2abd86a66bc9b594cb44b14fd318ce8a1b74d9bc5feee20caade709ad23272a
font_02_sfnt_off000112ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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