Malicious PDF — malware analysis report

Static analysis result for SHA-256 6774230a5f516168…

MALICIOUS

PDF

76.7 KB Created: 2021-09-06 23:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a195e9a3827ff0f52638a0b60adf008d SHA-1: 213c04c4b05fc9a6fa30421075cf06d604c6d003 SHA-256: 6774230a5f516168e4aeaf5e8d6eb9e84875f3ebd2087741b5e910711390faf3
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to external resources, many of which are hosted on compromised websites or disposable domains. The presence of these links suggests an intent to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://yournew.site/wp-content/plugins/super-forms/uploads/php/files/r1ftk3hobd912d9m0nonm8td7i/dawaxiguli.pdf In PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/tezokizawerosi.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/e30eefa19325cc24b9c1baddcd612f24/supagipizobulinepugure.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/60778203216.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/4c7a4c8f0ab0c2e4112b8eae94110e54/xomuzurapuvowarupivemam.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/26ba48abc7d55666c52e25b5a9e381fd/lotemodolojasifesemug.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/78368084321.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/zajakevazali.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609254be8dcad---35929109437.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/munuwuwedereruwitoxatavi.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210829_235657.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111f3383bb0c---70983125679.pdfIn PDF document text
    • https://shrisaiexport.com/lightspeedweb1/file/tuvugajox.pdfIn PDF document text
    • https://johanbjerke.se/userfiles/file/59575568106.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/pezunalefefe.pdfIn PDF document text
    • https://tsegypt.com/file/81086474246.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/7f796gq6dl8eet8ttj24pm8eli/barup.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/ginizalotawuximikago.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860fb166aab---8280859580.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121f71accbb1---nibalilagutozewasezotebox.pdfIn PDF document text
    • http://trunglamdecor.com/uploads/userfiles/file/67233433024.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=free+pdf+reader+crackPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/8ebf510d52b31f79b32e567346c5fbe9/wakababalupa.pdfIn 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://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_off0000c91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91D 17572 bytes
SHA-256: 26b082249d43808f9b8884148e26b6925392365367680958ae26529c06a5ee2a
font_01_sfnt_off0000f699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF699 10052 bytes
SHA-256: 773fadce59387efa83be1191f027bf27c249cb419e286a7a25d0c80361fbbd04
font_02_sfnt_off00010d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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