Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdee08302202e3bc…

MALICIOUS

PDF

92.0 KB Created: 2021-06-28 02:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 56b221f729ad3a84b9b930488f410fe1 SHA-1: 644732a18050e8e76051cf601432f54dc9d2bdff SHA-256: fdee08302202e3bc4a2639a018e2ad2c0ee2c63859bbc4846256ef54aad4c4a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://laborke.ru/uplcv?utm_term=house+party+game+free+download+android PDF link annotation
    • http://bukharageorgia.com/sites/default/files/file/53759149529.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2c33d8b49---22303995667.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/jimawenuxukivaruposenabox.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/82950406671.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/210624043427837600z3tzk.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/28886116472.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16077562c7ffda---13140481542.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7c9ce70fb---43023394189.pdfIn PDF document text
    • http://partnercable.hu/files/5653730236.pdfIn PDF document text
    • http://vce34.ru/attachments/file/tudosarelixujabufomemepab.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/4819db5759b400d14b182d2986c8267e/wodetek.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/a547f527f4728a3863d19342536c39ba/lipituxunelokum.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/554765657fcc3afa1ce9076f9169af90/46358108651.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/3dca591952917b9f9eed7e74b6a677a6/68359509388.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/7n3fshs4u0kfv5vhq30cvh39n6/sawipebagokumerogaxun.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210523074315.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160795072a0abe---39968313502.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/47c1be34af3ee2a1a457096206373e9e/39658616231.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/lekedepuriguzumovesopezo.pdfIn PDF document text
    • https://badoza.net/userfiles/file/towadenemilenapowa.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/vusukox.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/63566301632.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/jqea08pq4ot69nrfiqpp2tlhfa/majafafosavesuri.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_off00010475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10475 11132 bytes
SHA-256: 12c97c7cba35890c7717c8f0c5a8a5fdf6fb0907f8197d3d3f49dc4caf0baac0
font_01_sfnt_off00011e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4B 16948 bytes
SHA-256: c48d825495a2d1b4163f287365fb9019601b31cf33c6f900587a55049484ec36
font_02_sfnt_off00014a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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