Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec1dcc60bf7d7dd…

MALICIOUS

PDF

89.8 KB Created: 2021-08-09 02:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d906c019434dafd03c0a5c22fe5d0a63 SHA-1: 46dab101d08803c0a379ae382f38bf213c4c09a7 SHA-256: 0ec1dcc60bf7d7dd148fee765f9899e2ffb1793cefc4d535b0a4c0c467426e41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or directing users to malicious content. No scripts were extracted, but the link farm nature suggests an attempt to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://chcial.ru/uplcv?utm_term=ielts+9+reading+test+2+answers PDF link annotation
    • http://bellina.pl/userfiles/file/97119048580.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/27147169463.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/pizegisof.pdfIn PDF document text
    • http://nmglyxx.com/userfiles/file/31484202646.pdfIn PDF document text
    • https://mmszke.hu/files/file/tejebodilu.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16098728042d5d---74408742384.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/98553331676.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/pudorefulerunip.pdfIn PDF document text
    • https://mimpiindah88.com/contents//files/zunuxelodamifuvezelutot.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089187cb2229---faxik.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086982a24c62---fuvafodomuvalumiduwiwewi.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/41052734280.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/pulusoja.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/b22b0cce024e988d5ff28323a5dcbb3d/rivebujisupokugeduneb.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/puroxokaligogisulo.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/57487255195.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16097704f01b93---47962100438.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/vetivexigofu.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/27fb4211d988286de775d283f895c4b0/76401946596.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/1373617d85eb82a288c0cdd909016313/32869621799.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/22288990697.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/28977883974.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/wewirujugogitogajovusivi.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/97v16uul5d7fqfarvpltht2h39/zifogufijojaxobenoseb.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/98508801954.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fd7a8584e13fb75a6b6d87bb00a7e139/kuvonaseviwo.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_off0000fd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2B 10628 bytes
SHA-256: 0a23609b23153959d26d9d60b5a0751b844f44103ba7221716fe79e7388314e8
font_01_sfnt_off00011583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11583 16596 bytes
SHA-256: d45d0f3d59e6172fe973e3ffae0d64d2471ea6bf3f4e147c311c480b65fdf0d1
font_02_sfnt_off00014071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14071 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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