Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa915e506ab8f77…

MALICIOUS

PDF

88.9 KB Created: 2021-07-01 10:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6e91629b51a0b1f35b255ce123ed84c5 SHA-1: 0b0dab5a40d4a2f06d8b3762566d7b0a8827d754 SHA-256: faa915e506ab8f7754c4c7d0740a674b5bc9df4c2b22a37871eb396fc44408cc
164 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's an XFA PDF containing a link farm. The numerous external URIs, many hosted on compromised WordPress sites or disposable domains, suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate an intent to redirect the user to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://ketchas.ru/uplcv?utm_term=home+inspection+pdf+checklist PDF link annotation
    • http://chunmianxian.com/upfolder/e/files/20210617102037.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607994f6ac044---netekepogamaza.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc6b31e4699---ketuvadifesexebupedoku.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/364fd8b503d33198335ba2a7885de75f/baxowetez.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a040e22c5c4---sutez.pdfIn PDF document text
    • http://sakem.org/userfiles/files/lumibopavinakupepufo.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712b3910601---50433712088.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/serifuf.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/12880964102.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070f024348ef---noxibomib.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608064eb26407---91744667604.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61f83ca579---28164412710.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ac6a4d9ba---39682412843.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/d61fb09a9bb9425aeaa66b2c8712e798/jabupovubigul.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609100b5eafc2---95653312762.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/2n06bur8qbgueck4cnkgce1ne3/22863785805.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/jebabulafegamosa.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d503903c434---tudipenu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/5fdba089520a7629800bfb5661847b17/60236381366.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/67220872063.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/062f72bc37477c17ce21b21ae0205b88/71974953701.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/ladojozejojifotutuxegevu.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/balepiraxekud.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 17212 bytes
SHA-256: 33920b32bee98e1a72af7aaeff9c2c9af18e1a3094662298deb3804c928805d9
font_01_sfnt_off000125e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E9 10704 bytes
SHA-256: 857e4555e4e496dc91805185b38dcdd948c9fed0b6284d3c094f93182ccd77e1
font_02_sfnt_off00013e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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