Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd7cf1d8c51cdf6…

MALICIOUS

PDF

84.5 KB Created: 2021-09-01 15:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e6006e3cc1f3d3392ea980a0db10e008 SHA-1: 6f946639df547a0bfeaf1c8404d8583415c33f92 SHA-256: ecd7cf1d8c51cdf67d797f13fa245849f3fc18a99f519baa75a21f95d673ccdd
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to websites hosted on compromised CMS platforms and disposable domains, suggesting an intent to lure users to malicious sites. The presence of multiple external URIs and link farm indicators strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/zaxuxa.pdf In PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210715_461D82C6617C8131.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74ae244add---zobix.pdfIn PDF document text
    • http://renovator.cz/files/file/mejivexowifudilekokavoso.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8526db6f44---mubowupuxi.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/sagos.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-9/20210609194703700053.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/2bpac2a03emte7trn2do5t8lke/kazemewevek.pdfIn PDF document text
    • https://hirurgija.me//files/zawovokonikuxuwi.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/towonofawedokolefej.pdfIn PDF document text
    • http://arlingtonhigh1959.com/clients/863184/File/wilivukujofiko.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/seziwubikotowovo.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/badiborijovepetabafufet.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073ed943a0d1---jugovoxudagobuloxa.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/57200182043.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24323d5326---97885119670.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/84727800849.pdfIn PDF document text
    • http://lovesenergy.com/file/fewudamuxanoviromewif.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/rawuwenewafisejifo.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/1th76ihnhlocdm55oprclu0mnq/temifaresiwumufuzidejowe.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073095c17908---debovusewutuwetosopefuwi.pdfIn PDF document text
    • http://scro.ru/pic/file/10858947682.pdfIn PDF document text
    • http://fitviewer.biz/files/file/63061192803.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/84734748127.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=end+to+end+network+security+defense+in+depth+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_off0000e299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 18016 bytes
SHA-256: a5fea60fdaad13f95f85cf29bf0d3bbfdd6696e528330bad50ab89ae5a11223a
font_02_sfnt_off0001291a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291A 10884 bytes
SHA-256: fdeccf92a02fcfbc0e232f589d79028f6741047be8198957f18a99e4b91b032e