Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b447068356dd94…

MALICIOUS

PDF

88.9 KB Created: 2021-06-26 13:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f552cec6f18172c6e740e7ba64a87f65 SHA-1: 6e7c815d573fe136cca56d30ee398c028066ab6e SHA-256: e3b447068356dd945266a7e68b8c80e2b0b2a1d752f54904d0dd9b9e601c1024
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate the PDF is likely intended to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://garglob.ru/uplcv?utm_term=download+pdf+file+on+button+click+in+javascript PDF link annotation
    • http://blessingsngo.in/userfiles/files/95681887002.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/pelikupemujitexetarikew.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/59153315161.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ac8b6cc40---kiwofosa.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/986564f97a640db6499108d1bfaf43e0/vewilidetixetosi.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160af6de13ddc1---pivisagutevu.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/hb5d29dnnnao27v2ogtkgviami/jasolosizezijabefozigoz.pdfIn PDF document text
    • http://kalikraft.com/images/file/76650417360.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/79898361344.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/00a68ed1b5f9781e628545566d2648c5/85717516228.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/69164607435.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a06317ceef1---xonuvuzo.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a13a3e5d48---28675599608.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/xinurigepozamukow.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8682e29954---tenogepulireli.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/kudugosigulerubipaboliv.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607252383c9f4---denawotivas.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/4c9c5e15826a800488767d377471d5b7/tesavere.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/besaj.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0628995a2b72be57f51d720ae9754177/wugox.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be3da2ebc6---97985760176.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16099273771e25---bodilujirusujijopefe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013709.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13709 18988 bytes
SHA-256: e8524a416391f88198430fbfaf4d419028aef4cd23ca127f2b5ace70e1ed1fd5
font_00_sfnt_off0000d525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD525 11228 bytes
SHA-256: aa86d48c2ebeb23b8c81ef39a8344c1f36aa0ebbf76587c3ead67a9a28a68c18
font_01_sfnt_off0000ef5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 18292 bytes
SHA-256: 31e0c288831fd3175067c3e0d348fd7124c49850857b68827fe9581ec51416a5
font_02_sfnt_off00011ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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