Malicious PDF — malware analysis report

Static analysis result for SHA-256 00596c675088e40a…

MALICIOUS

PDF

88.5 KB Created: 2021-08-22 01:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bf0b51d4083515a9fcfb83ae50c0ce24 SHA-1: b0036fbb3c1b15d42927f561970a6e6a9118bc9b SHA-256: 00596c675088e40a34c971cda776f8c2fb98535639d2473e338cdcd53f0a1a0b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier. It contains embedded JavaScript and numerous URLs, many of which are part of a link farm hosted on disposable domains or compromised WordPress sites. These elements suggest the PDF is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=barnett+vortex+youth+compound+bow+package PDF link annotation
    • http://all-vehicle.net/js/upload/files/nusorewabofanetet.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/vufaverivi.pdfIn PDF document text
    • http://chatsworth72.com/clients/5/53/532ec3c8dc0e95779814939736d4df6d/File/xaxovenorelojom.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/18361623138.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081a5fae0b01---nusiwamodikafonasebog.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/wagimufexivesudosunuk.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9770dd544---43624219990.pdfIn PDF document text
    • https://maplesservice.com/wp-content/plugins/super-forms/uploads/php/files/ef4d36367308d75a962a9c54e172c7a1/tavezetekegomuliwa.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/gesivaxowilafupiwisup.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c224eb9eac7---kezorifejeviwib.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/81bf325744167df2e9e643a81e7cf4b1/ketowovilosa.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/xabag.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/66124695849.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4652e79a0---zevidekabaxibamuj.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa253396f5---95086048722.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/75449810516.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/1ab8a38ecbd762d1840227b057a0ce03/59727159820.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/f0842329a7b6e7d5b293a655d387d871/sebomo.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/kigelatex.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/92a87975dfdd4683033d401235d4eb37/2133392546.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/pedabig.pdfIn PDF document text
    • http://sino-web.net/filespath/files/20210815122323.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/11321565566.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/11751539713.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_off0000f2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF1 11408 bytes
SHA-256: dd12e90b31e8a33edcc8dad40723700ac9f83d0ae271cc766ee6716225b06531
font_02_sfnt_off00012554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12554 16836 bytes
SHA-256: 7e795cde0205127b9a4946d94d22c488bdb22ad80d60cc0c46c099fe4eb09b54

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