Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc29e5ca2ea8732…

MALICIOUS

PDF

76.7 KB Created: 2021-09-13 17:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f215d9d3005b7b92f6dfbd8466f9daad SHA-1: 2d478f69bd6a292cb2b9e4e78eb8ea7ef141bad6 SHA-256: 0bc29e5ca2ea8732a2afbc703cb191543775797b13cd95c39d4f26e692d14702
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to 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 0.9963

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://www.mamafoundation.cz/ckfinder/userfiles/files/dinamorajok.pdf In PDF document text
    • http://srilakshmienterprises.net/uploads/peforasobikur.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/rorupikobefafije.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/94183508429.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/3884825066.pdfIn PDF document text
    • http://itena.si/uporabnik/file/67976513452.pdfIn PDF document text
    • https://synersys.fr/contenu/file/nunumofapuwe.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/jirezepenasin.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/fitebobezajunosar.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/nipej.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/48755904200.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346b01c5106---93542841674.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/sizukebijapiri.pdfIn PDF document text
    • https://zibarajabi.com/cache/fck_files/file/vewomanopuguzex.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e95749cc1e---motamajenuba.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/58522000303.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__613B0D8916EA7.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/poxar.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/36266663520.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/hctbfcaientmj9avk8rdoj6u4q/35506435330.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1630835802.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/duzapenubowejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=emoji+keyboard+app+for+androidPDF 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_off0000c7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BB 10804 bytes
SHA-256: e0da18e2d33b2fa99e5c08dbb5676b5f342032196eb90645fc10b6d673abac1a
font_01_sfnt_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 17416 bytes
SHA-256: 32d473678d7fae4000b35d32643b33a65433f0496538702cf54de33fd97e821c