Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e34542d5494be7d…

MALICIOUS

PDF

78.6 KB Created: 2021-09-13 11:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 62c9c1c47929cba47336530bc6ff17bf SHA-1: b585bbe1f56dfd59455ab36aa8f6010ce0592171 SHA-256: 2e34542d5494be7d4ee3bcf8a9879f915aa565a5dc56db99a520faa2cc7c68f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://millinerandassoc.com/files/file/fijiramoruva.pdf In PDF document text
    • http://parikshitconstruction.com/uploads/duvatasiviwaxudemen.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/63312312345.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/kelopilewewu.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/10060207325.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5okhu5213bibub8sva6f2brfu6/kavegal.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/cf6426a938e82023558861cf415b7cff/48090509724.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/37525193285.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/segubabemujujikadijog.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/32079704921.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/padegaxuwuweba.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613372ef20023---76339609013.pdfIn PDF document text
    • https://maviet.vn/upload/files/parosavedupevoke.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/luboruzu.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/xasewetefegegosaz.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/pudexeguvasuliziku.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/23568202633.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/xejamonulejilob.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc4be4c65b---88740032984.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/tawesobumekuxivepanaz.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/53687246687.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/54548779270.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/48601388956.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/fufawevunajilubix.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/xozijutegapesulogulab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=is+facetime+free+on+androidPDF 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_off0000d2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A2 16672 bytes
SHA-256: 794cf9c6d1f1ff5560db8849a64e22c1b3944a96c2d89ccfdb2e6fd43121e71b
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001153a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153A 10540 bytes
SHA-256: e70c2d964300f29216a9af9477538d5ecb9d4846507bdbbce7dbf7e764911461

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