Malicious PDF — malware analysis report

Static analysis result for SHA-256 62675f55904ab088…

MALICIOUS

PDF

64.3 KB Created: 2021-06-20 10:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2ca2391353651e9a9241035b5e4ff19d SHA-1: 917aa4a8084afbe78456fb18016508fc8623e750 SHA-256: 62675f55904ab088c63d27f98ac354617b9e91da93917d16e4e49c39d17ce9ee
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81dd27888f---xegagifokakamoz.pdf In PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ff687ee0a---35996297176.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/48963966339.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c26447f2b---61965018429.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ae204686d---geduvaxovibovi.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/24663258732.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/j2d0aeuupeko2l3u8qjjrng37s/20253009468.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/62199906780.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/a52d7j1m8a6vjq4ls7rjvm1or4/2026348956.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/bejimodivabo.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/nakupejakapasazubefifa.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/39836589321.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bac66477e6094fac46c917f01b2717be/gozukijenidimeritura.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b821c64faa5---limabujapuw.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/ace57bb3c764f5e8f738355f08ef1648/76751650059.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/6fd3d2d121cb5c3bd1b896196f450679/47254105368.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5f3548cfb---wimexizeto.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ed25b54d6---bowelo.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd80c18c0b---zigufonerilenumiva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=fluid+mechanics+russell+hibbelerPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA8 5272 bytes
SHA-256: 5fdf6ca930f8cb005f921048b6a29896316abfe1845376c5baa671f4aa6790e9
font_01_sfnt_off0000d065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD065 10348 bytes
SHA-256: 7e8a1c214b82eb42cddf4e1e53bfe9e3a013795f48828914f1223eab7883546d

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