Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c5eb203c675e41…

MALICIOUS

PDF

255.1 KB Created: 2021-06-29 04:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fc2e1757dbb7c66b09db305b3bac2bee SHA-1: 1f4c68f8a9f0d90b20513f4fc689d3e5292de3dc SHA-256: 32c5eb203c675e412785bd5a088c07c7f91abc01ed2e7c556f52cc5b7a217400
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a link farm that redirects to a compromised WordPress upload storage, indicating a phishing lure. The PDF itself does not contain readable text, but the presence of external URI heuristics and the compromised CMS upload link strongly suggest a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9550

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://autoteam.in/ckfinder/userfiles/files/93695103.pdf In PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c57ec2993b6---69358757781.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/0mt06g8ao6p1s50d3u0ivea14i/33209744976.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/gewutizativado.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/86115912002.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607eac186361d---veziramowiw.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cefb424b2---21292155336.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/77575057314.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/zunotezulopuvumubevab.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b2923d25051---bukomusulosukibi.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090471663441---46021818614.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/sevujaxi.pdfIn PDF document text
    • https://hyundaia.ru/userfiles/file/24181868663.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/fesawodudi.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd0704bafa---92606926975.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/91808241598.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3dc026e8e---zerezezoboj.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021062312045773499.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7e6db28410---nasurirosakitupemorugam.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/of3ceo9msfj0eea472hhr3ckr2/87676057140.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1624551741.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/b2c17f5472cb625c209a6510737a7a6f/nutewexurefinu.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb242abb70---53483933595.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/77066005823.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd3de9b603---keneg.pdfIn PDF document text
    • https://dptech.vn/uploads/files/milanekawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+long+is+a+day+on+venus+in+hoursPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003578c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3578C 10788 bytes
SHA-256: 712572ebc9fcf9b2fb2c1213e32392b8d20669d13380e1716928191fc2d69fba
font_01_sfnt_off00037029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37029 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003883a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3883A 16420 bytes
SHA-256: 8f9b228a9505afd0614bec22b88ef6ec1afa7eb8721e424bfc28aaa11c8b60f6
font_03_sfnt_off00039edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39EDB 3988 bytes
SHA-256: 614cad522e79312f90cb49a677ef5603da59c7926430d097d0af492d3a281330
font_04_sfnt_off0003adcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ADCD 25340 bytes
SHA-256: 291934df1a2b819ef6766f2aae60b9e35a3c91fae011f24e432eb454682f7c14