Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa95ca1f490f70c…

MALICIOUS

PDF

93.0 KB Created: 2021-07-25 03:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7f05de826127a47eaa9613436a038dac SHA-1: 70dffbf493a8f3cc8492655c2b447b98e0c01c22 SHA-256: ffa95ca1f490f70c2a8969be0037274052a9656886761f3d777c85569b9e046b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to compromised WordPress sites, which are likely hosting malicious content. The presence of these links suggests an attempt to lure users to download further malware or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce10e3e173---lederolebelirazol.pdf In PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/a50d5d89bb8453e6513de30d33cc9ee2/juzujiwodiwo.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609779e18405f---xuwusazizemozozexanif.pdfIn PDF document text
    • https://fobh.net/userfiles/files/26879890164.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/1f14a115f87800fd9cd764d8d3f4ce33/99758312345.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16075c1a887736---83921193278.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/881d0d097dedd407da97ca7d2b69c98e/17636631506.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/109cf64ff3779c19b8208ea225855b01/kolusuzutexupuxiratuwezip.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/21323909219.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/28cd25fb3f4aed89cf68a2a983b998af/wixuwejimubijefaritorimo.pdfIn PDF document text
    • https://ivaco.it/file/945304126.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a72fb178fb6---bavasuz.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/63310733234.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/79971e479e871e9b62cbe63c47bd3a58/sivafiwego.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16073f451e699c---gadabowaguwifuj.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb61eba932---zokefexejipugejinojeb.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/gimiqps43ruf6fog46uukat0uv/4418918488.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o42l5srg5s1s7eeudt114439u0/romepomugixej.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/fce92257709a76f0bb95872777dc1dc2/18823845463.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/13935626758.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/13365778848.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160afcc43e8814---58915000201.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/648e1895e901e981557e845acba08b5a/55750992260.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=time+master+pro+ultrasound+from+koreaPDF 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_off0001072f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F41 17232 bytes
SHA-256: 4aed58bffeb3c66c6fd776eccd6aafa152ec8a2c4dd101f0f91ace123e48d055
font_02_sfnt_off00014c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C7D 10816 bytes
SHA-256: 979bffebde4d12d1158159d2b7207b17ec8da4d6fa5c6aebf8f1253ccb2d1875

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