Malicious PDF — malware analysis report

Static analysis result for SHA-256 018b6ffd430e3416…

MALICIOUS

PDF

102.7 KB Created: 2021-08-22 06:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 66db6b89aef2df8ddc3d5e7119ab81c8 SHA-1: 0ce4685e2339f9e413d0d0761c4d3fd1d0719d0b SHA-256: 018b6ffd430e34162b99146a105dded5da443f77de267983e41f4c409adf8226
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9636

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://huntic.ru/uplcv?utm_term=npv+calculation+example+youtube PDF link annotation
    • http://musikpark-live.de/userfiles/file/pisivusurovafa.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/31410006740.pdfIn PDF document text
    • http://s-box.eu/upload/datoteke/25469629942.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/47075832219.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/76792167211.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160b7aca0acb7f---91345055007.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/f68f094792ccf7b1f498cb032adc1b2c/91343668344.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/feposalonogusikonifanam.pdfIn PDF document text
    • http://rosswellbulldogs.com/clients/b/be/bee1e50a814ad4ba40998340b8964064/File/vowovuxiwodonosonatodot.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/xowofijetojexusuxapogo.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/gagolevapujizujopizireb.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/71958614126.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/sevanetizove.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/677ee01f7f11989e04ca7fec029f5d12/vumepaserekaduma.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/43826135962.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/57776691833.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5cabe3193---7728914274.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/35dd7805707c8ff34142ccc69656ad5b/19930723016.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad832d1a54b---sedanovekibibopifekijut.pdfIn PDF document text
    • http://reunionfamily.com/clients/6/6c/6c58f7de0247188f02debbcda007d80b/File/95034587257.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/lukukizagib.pdfIn PDF document text
    • http://xsteelstock.com/d/files/fapazifidakapudekorijali.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/dapapevatufetudofinemulo.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/53356169156.pdfIn PDF document text
    • http://chatsworth72.com/clients/5/53/532ec3c8dc0e95779814939736d4df6d/File/gewipapumojizulezu.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/fdfb8358b826f3f6cd9c20bde45dc8d5/22358138772.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13231 10768 bytes
SHA-256: 4d9f880ec0fbbf32a72831684c561a206ebb152260fa1e4fc583e2e4714a4d7a
font_02_sfnt_off00014ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ACE 16084 bytes
SHA-256: 325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7
font_03_sfnt_off00015ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FF6 17032 bytes
SHA-256: 951f9cfd54dc4de690508329d01782446f8002b10ac98979787f6613f083efc9

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