Malicious PDF — malware analysis report

Static analysis result for SHA-256 9745c82394a7c704…

MALICIOUS

PDF

125.1 KB Created: 2021-07-04 15:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bb0c7b0ed8f58de052293b45843a0cb7 SHA-1: 2a69455b5bafa4423391e32ce1934a6a9c06fd23 SHA-256: 9745c82394a7c704b81e95f201bd950df4b57a40513874c98eb9648cf57d00ac
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 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. No scripts were extracted, but the presence of numerous external links indicates a likely attempt to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/cdf20e07369c55c19f74b7769df9efe7/59388124098.pdf In PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/7g836fq9q8b33oaah82q6480qp/51858405226.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/92bc6240828034b6ff4d463365f8d432/27456383982.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/mikufewoxeroru.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16099737c67fc6---51508385151.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/46086599858.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/xejalerefefaloru.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609d143271457---lolowitede.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af0ad47a5f3---tavubajewadejujok.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/vabunekibefivawar.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/76924570298.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76e4ce020---napujudibogufuzisokovifu.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/73574116895.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb60f2c4e3---54173233950.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/d86e6521d3032b9bf1a83dea747b2008/11145748868.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/18869022554.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/65379670710.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/11jfrgr25u2nkgm1dbro7fbmfm/relusuwafagoderovaxitusuk.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/vowime.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/vuzuzawedewabomuda.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7afac9ecc---wutesevajijapo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=it+is+good+to+wait+on+the+lordPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e5f294fb2b61a4ba175cce873e843f60/69767796129.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001676c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1676C 18296 bytes
SHA-256: 9424583589fc6185caa99e01db3fbe64289c79c7dba4c4a4a48ddb821e12be6c
font_01_sfnt_off000184d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CF0 10564 bytes
SHA-256: cb54d5fd0132dd4b04280519afe779b823c3ed87defd8b88b56ac093fa8bbbf7
font_03_sfnt_off0001b4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4C3 19892 bytes
SHA-256: 7dc4f9e11fb709f21187b89c5cc14372e4fded0569828ff7fb6401770cd2e71e

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