Malicious PDF — malware analysis report

Static analysis result for SHA-256 211102dda69fb18e…

MALICIOUS

PDF

94.9 KB Created: 2021-06-27 08:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b71dea65d1550bcac6d02f12cbc29558 SHA-1: d4f54da8629e6b05c378d4c3401630f41956e9f6 SHA-256: 211102dda69fb18ef1330fbde1cd4f27c8995850339909fa0c5714977c7d6b7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and UTM parameters further indicates a phishing or malware distribution attempt.

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 http://grapevinewinerytrail.com/clients/876125/File/59073284290.pdf In PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5f30425db---subaturedoliregapipeli.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/pls475t800pog5jnifofutvrj7/39851041703.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/92cbfac764a389985b52904a623ab9bf/vixiretoxadefubumowow.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/c26209816754521f5b4e802086b9eeb5/43065869425.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16076999aace9f---nevuruxare.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/bf00130a71ee07a6bdc74d65efb9bfd2/40385196323.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/31c174a60da10ce4f70306d4def5519e/87226705174.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/nj1dhthluki5a97qhmeoscf477/piwixosesexef.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/e8a981fad60ba354a63d6974c964cf7a/22661064399.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/jitakameneviguwilazawa.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/47099369755.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/c5e0b32a89791620b79bd5f9751af6b8/dulixudisajazifi.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/5e93ff3ee14644bd3d6a44e7450104be/9127100229.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5e732630c4fc04fa36a681efb8892820/78259037113.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/obgnpmvk237ofcndg87qglosi7/jagewexinawetevetebov.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/4c6d6420ffe57971ff58d8087152b1a4/xolomajelonew.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/484e74a920e0b8a252a57d941de433ba/16852464513.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/c9b83772f29bf2011f8b52a8ed2edc92/fululapazotutirob.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/c20758d6140a8205a4b2141bea306aa7/76602792344.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/gizajakisaxeje.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/32573021047.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f87c78682c---40506209264.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=mig+welding+defects+pdfPDF 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_off000111bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000129cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CF 16720 bytes
SHA-256: fddf9b5e3c420a214b4b8d8108f963ebd44b53bf5fcd410753eb2e4ff42be310
font_02_sfnt_off0001554b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1554B 10492 bytes
SHA-256: 911727115ed349b2ce39aa1c0adf440302e9ffb7616484281ed665dbc60f5c69

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