Malicious PDF — malware analysis report

Static analysis result for SHA-256 db853466ec486341…

MALICIOUS

PDF

84.3 KB Created: 2021-07-10 09:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7ee555e0e01a91183db065bdbc808d1f SHA-1: e67bd137b1d633eb9a615423f0ef1358d0e77d3f SHA-256: db853466ec4863414ed31dbbcebdab0350ae0318fa784f4d110f2c31e5a6cc79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://queure.ru/uplcv?utm_term=protected+pdf+hack PDF link annotation
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/6n2c8u92jakhbdgisa2l4eh8pe/95468266623.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/11413585192.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851802b55dd---xegexejuli.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/serarekunaxetogaduvixap.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/89846774225.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4ddc2e281---58828092776.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/97c61ffa8b4f69c9121439c2f0d4c203/13499069433.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/kojibofuru.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec7b6362c6---gapebigirabib.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1163c4a35b---bakewuvojuwapew.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/rbhhm085s7m9ahsdjiehmmuuke/jeganaxe.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/53649088706.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d2145e2e856---nasuvek.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/kifuruparakaridobedaraxi.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6568a9f33f---somixodejesewara.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/82019093504.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/2d82c54ce421f3a74020d8485aa56b15/74523139928.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2556cab5f---44515763709.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data//files/zibitixedalixazatax.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/31206817366.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/najemafisomagamiwokot.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f849f1520---50049456713.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7fba311b5---10480637198.pdfIn PDF document text
    • http://brlairport.com/images/file/76911842167.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_off0000e7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C1 16976 bytes
SHA-256: cd6c1eaeb4a708bd1621fe2b01c90946179d431361fad46af269d389bc6666f9
font_01_sfnt_off00011406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11406 10400 bytes
SHA-256: aa05f44740dbd38c78d31e36c5ba0fe78cf3c15f1b1ede1e4346b516a4bda44b
font_02_sfnt_off00012bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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