Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1ab22e052275c4…

MALICIOUS

PDF

89.3 KB Created: 2021-08-09 13:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4b7da19ed9442c8dc1208b979a68a05d SHA-1: f46bbed3f8af0d3ef2851464ba2ec0528bbf6243 SHA-256: 0c1ab22e052275c4802fa538e03073bad24104bdd7fd0cde1a493060db557453
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new or changed payment instructions, a common phishing tactic. ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d4b32b726cd995be17dec87991495c9/18090044989.pdf In PDF document text
    • http://soundspace.eu/Upload/file/vusoligalaxiwis.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/76179844830.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/lexijinajim.pdfIn PDF document text
    • http://gptools.net/userfiles/file/16265207356.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1b9cad9f9---nozen.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/7c04b033dce6f8fac010bc1d7cd2e7be/88538030906.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/xidifubesupawe.pdfIn PDF document text
    • http://chikatere.com/Upload/files/82071825930.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/kekezuveropuxagov.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/zugesakafodunonud.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/bifimikir.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/1bb30363b18ea52348562ef223e05291/32447420673.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0d67b3834---tezimamalokinozabud.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/24924605220.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/0608360ab97bedfd28a1dddf01ef8c9b/mekodotemuvavazex.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c63f425af52---45552298450.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/sogebavawab.pdfIn PDF document text
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/navizimo.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/3fc9da92615d42c596ef260ec9082e75/revoxasagusuw.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/ruzaledumosupipon.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/zujotetenozeloko.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/1f0d6e2bfdb436ffadf9607d68fdb4ee/33606058487.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/zuviguwuda.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/dudoxutenuvugi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ignou+b.com+admission+feesPDF 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://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_off0000f6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 17748 bytes
SHA-256: c6651df11529d17960f2a9168b25165a0b3277298983718a6a857431804ed768
font_01_sfnt_off000124eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EB 10832 bytes
SHA-256: eb416685751de2016f86a8c99075e604928c2ae9d31a1eb048614f25fdcdbee0
font_02_sfnt_off00013db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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