Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb4e53daabd520e…

MALICIOUS

PDF

88.7 KB Created: 2021-09-19 02:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aab63a475d78c29a577681a3a7b2d2e4 SHA-1: b9cdf1439713350e8802c1462be1ae79af1841ee SHA-256: fcb4e53daabd520e8e3df772cfa8e7a2376ddf76bfde327c20906336ec8a9ac7
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites, suggesting an attempt to manipulate search engine rankings or redirect users to malicious content. The PDF structure and embedded links are consistent with a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16144125c31926---1358164742.pdf In PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/simalekuzezejixilotosew.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/77463447896.pdfIn PDF document text
    • http://altera.ukrstroyka.com/content/xuploadimages/file/lesuxaxolaxuretoxafi.pdfIn PDF document text
    • http://liily.jp/upload/file/20210903222404.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613852118642f---72136434546.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/44817826081.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/wuzuzavorozavusizin.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///wodotirobalufedi.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/kikefomerefirafexaralewol.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/timabupalobosuxufaneg.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/37616798400.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/255c598d23e47730fba9e6b0ccfb28e8/47239127541.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210905_055418.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/fegofifazigizubogu.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/piloge.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1632001313.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d89c5f421f---34678315205.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16142615f88a18---22976580634.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/4877bf53b889c7fe4e2fe19cb4dfc32c/70068829341.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/wizebonebakobi.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/fa368d71705639b9ff077234d731756b/pimopik.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/46872831924.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=youngistaan+full+movie+watch+onlinePDF 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_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 17628 bytes
SHA-256: 86ab2d8940eac3a054c9bc8530934f5dce1491becdaabd3bfd0b64628db956d6
font_01_sfnt_off00012454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12454 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6B 10916 bytes
SHA-256: c422159e650611be6d61d6eaf47860f755ddb48944529e81cbb694fe4834cbbb

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