Malicious PDF — malware analysis report

Static analysis result for SHA-256 7240623a31aeb605…

MALICIOUS

PDF

60.6 KB Created: 2021-06-23 18:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9c2923c78c25b66171cf0e2339733da3 SHA-1: 0539afb37bcde83aedee3429ba6422cf58aeb0c7 SHA-256: 7240623a31aeb605f426011a4d881f5ad688ea19661e6f55b93c4b563b7ec56f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous domains, many of which are associated with compromised WordPress installations or disposable hosting, suggesting an attempt to distribute further malicious content or phish users. No scripts were extracted, but the presence of numerous external links indicates a likely intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://catamma.ru/uplcv?utm_term=dil+diyan+gallan+download+mp3 PDF link annotation
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/68191659329.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/pelim.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607a806cc8d14---wikarutanirexe.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608035ee326d4---25429175308.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/lifuzu.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/775a688ecf7921dd9f612c571032fb8d/witanulixakuj.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/lofivifuvosetolokokuv.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d3348e16efd---dexurazewifikulopam.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/630b1503d30bcb7395cf0dfe32cf326e/xazadufivarewekebu.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/oot54sgpbu28634pdfsd0qopt6/64892479909.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b58095ab2de---54807020671.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/0nquqmjpsmqcvf8ekicqp5jrsl/gonebudojozijewuvigoko.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a193777e5a---30801174685.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070768a857e3---bogizutixuboporeze.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/jejijofabaro.pdfIn PDF document text
    • http://igorodstore.ru/files/userfiles/files/zifolinekujokuru.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607046b640a11---56834701119.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/jebimixi.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/vajenotisikonikemanisojo.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097658e8da25---48910781149.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB206 5360 bytes
SHA-256: e59513db95a9cfc13d554c6b8f60c5453d54bda60d83c3266dcc508fad2f06f4
font_01_sfnt_off0000c458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC458 9600 bytes
SHA-256: 7b2124df5f8de9a777d56583fae7f67de019ffc093c342dc9fd239e7649dde93

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