Malicious PDF — malware analysis report

Static analysis result for SHA-256 200a2be76e669a6f…

MALICIOUS

PDF

118.1 KB Created: 2021-07-01 13:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e789027dedefdd49916774ba85acca7e SHA-1: 4559e48b745ce094933bfee6f020cbcef98dab5a SHA-256: 200a2be76e669a6fca33a24e42438af7c9b9623f0463e2ff26ee4cf7f924a458
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pixomot.ru/uplcv?utm_term=american+hot+cakes PDF link annotation
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099fdb1a7d46---70162789985.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ecd855286---65722534764.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/ginulejireli.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/deb366967d399890c9ec0c1c3adec6af/numenoropujowavijimuzaj.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/sitixuv.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32913532466.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3323d31af5---6721807497.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c4525ecb5b8---telitarupuvutofa.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160860df4d55df---gesureruvixami.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/datetanisurowekum.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609505de041a1---20671279978.pdfIn PDF document text
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/c7c40ac8a6a45649dd054dee330eb6c9/tubokubimenirurajoxuw.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/96460754336.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/si9ahujdng0uu9v3fajtfi906b/70262458028.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021060902363473499.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/096c2d80454af91239b570a8b6680104/zuzekali.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/fadogi.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085fa2ca53d8---kulamapejifelepoda.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fc80518f8---14737888491.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b69703750fb---mibalumabumadugovexo.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1c1c0dc49---nopewib.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/gigozarudepamebuxagebo.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/16ak495d783ab9ta9mdiol29u0/xekirosixelofo.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_off00015d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D41 25468 bytes
SHA-256: 80a531726541e2421716a6954c9109c90056a9f2458360c0e0ef51db1f58ca92
font_01_sfnt_off00019ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BA3 10520 bytes
SHA-256: 1f7b9e98e685afcfb22c0b8714de4c2806779c7814810945e0a2f8aafb670f70
font_02_sfnt_off0001b36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B36F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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