Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca46f369ca53107…

MALICIOUS

PDF

83.5 KB Created: 2021-09-08 07:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c37a8a734b896d2f0fbac2367a5ad9ae SHA-1: 595347d9ed8383eb1232d5804a426555a106866a SHA-256: cca46f369ca531075ea8299d450835a68c8ddbee21205ceb0f78ea3a2f7ba472
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or SEO abuse. No scripts were extracted, but the presence of multiple external links points to the document's primary function being to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/zujujugenorumezumito.pdf In PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab62be7eb6---71022206021.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/29842621856.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/55011d8841fbce42f106eb8a0a24d5df/putafebosegonififaj.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///82642106749.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/103ceac191d94db3f6d15f96ef1f5aeb/refanuvogajujilobisinifat.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/67388865942.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/31734772424.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/21211364742.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/1383696012.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/wumaterijunaganirat.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/bolugixudedak.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/32148285086.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/b8d4e2f38c6e67846edce54857fc3c63/33149484821.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47aa05998b---54239564770.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/fabagapigirewosuzuzilon.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/berabizupofimidetum.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/94c831621fb0057a25a363841ca30da9/zonemebexu.pdfIn PDF document text
    • https://windsbs.biz/files/file/78992320590.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/56a065047952c66ef6d95ed4b0efab8b/73028305891.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/zudogosavafulipol.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/tukutunugalobi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=international+journal+of+self+confidence+pdfPDF 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_off0000e1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BD 10796 bytes
SHA-256: 6d35f09dfbd018af0c4554a1ef05d4d3e8a288f8e29d0e7fc64670b87db9435a
font_01_sfnt_off0000faad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BF 17620 bytes
SHA-256: 2b04c39fc9ad6972ef687a24f131adfca7d6103e12c6255cd2782da07471a86d

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