Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2b3ccacb6336b5…

MALICIOUS

PDF

91.5 KB Created: 2021-09-06 02:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 84eab2716c577bea8f4721320008a3dd SHA-1: 120dcc993b55d523d0e7102b2a4344ef837f52a7 SHA-256: 0f2b3ccacb6336b5c81e99992bca500d73d23338412b2c593ff9af19c5427ff7
156 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple external URLs, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous links on disposable hosting and the use of UTM parameters suggest an attempt to obscure the true destination or for SEO manipulation to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://jhdjt.com/images/upload/File/rumuvezejaxuji.pdf In PDF document text
    • https://genia-groupe.fr/images/files/93867746050.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/kubirenasazuwedanefor.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/papejinavakanosufenazikim.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/41926003235.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d06f7800ddf---bavuje.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/c1cbb4c7fe5f618e382da683f7896eda/suvisuwigoba.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160805ee384038---51043687755.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/u2n8d4hfvotglg08v6q76isbt0/47661832085.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/76d1af7761e43b40e7fc97b26df56e68/83372263318.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9b2d61507a6da3dd90051ac20fe75894/bujokitasawitupexerawimaw.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae53fc4a3fa---fotaromamagizox.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/gelevozonupaf.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/58923678618.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a01fe9719---91027391791.pdfIn PDF document text
    • https://taybaite.com/userfiles/file/90380167530.pdfIn PDF document text
    • https://etadelloro.it/images/file/86922578352.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/42069115912.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/d0c0730c75a98810e36fde34892cb9db/6764164242.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/kuxufaxegukexazate.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/ii5hun0o1t1vfsfumrn57lb8ok/46938732936.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/bc12c2ef90489d1b10009df50fe5e589/83509344194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=worksheet+pdf+clothesPDF 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_off00010291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10291 17648 bytes
SHA-256: e616a415e867b830cb57b3748fc39aca45c684b3ea5105cbd8ecec186ebe41c2
font_01_sfnt_off00013097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13097 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000148ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148AE 10444 bytes
SHA-256: 700b5de06dc6c651dfb1294563998726d10b7c91dd35543d07bd71509d7ed6d0

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