Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e2c91cd37c71ec…

MALICIOUS

PDF

83.3 KB Created: 2021-09-07 16:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 078d855d07249c3965199c579c84bc39 SHA-1: 1de6ac7db056f163fae83296e5d225d17b786c6b SHA-256: 69e2c91cd37c71ec80b7a8e6936daa716113c687aebf4ee5342b3950e849532a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, directing users to compromised WordPress upload storage and other potentially malicious PDF files. The presence of external URIs and the overall structure suggest an attempt to distribute further malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081557ccea67---17953471068.pdf In PDF document text
    • http://habitat3.eu/userfiles/files/ruredirezetisarev.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/xobones.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdea4105c4---zazawu.pdfIn PDF document text
    • http://longhornrings.com/clients/0/08/08da48574b41509ac7bedcf2500dc652/File/87350774741.pdfIn PDF document text
    • https://fultoys.com/userfiles/niguratotoxosuzelobiv.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa9d592630---3118542909.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943291a196b---26963320143.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/61042894206.pdfIn PDF document text
    • https://www.retake.dk/ckfinder/userfiles/files/67101312154.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/bupamizanoniverukiz.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/dipaxofezadaru.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/46824865719.pdfIn PDF document text
    • https://mmszke.hu/files/file/bawoxozegata.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/nekenulu.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160724709a7538---doxiw.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3131089820---safabagorotaj.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/vgkgi3noqlivi0ujv8l6fn8tam/nogagal.pdfIn PDF document text
    • http://hzaidele.com/images/upload/File/fifozajexigowet.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/74491377136.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094642c26daa---54853810614.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/83932072468.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609feabe039b8---tivabewejewewuvedowuragu.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/xuxatowusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=transport+worksheet+esl+pdfPDF 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_off0000df34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF746 18232 bytes
SHA-256: ac6ec560ba071f0d6938776e4516efed2dd194221781989aee732e74d458fb83
font_02_sfnt_off000126c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C9 10644 bytes
SHA-256: 97841430bc732a4dced86917630bcec5b2cbaca4717e726ae559b3872bc405aa

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