Malicious PDF — malware analysis report

Static analysis result for SHA-256 301ba378abe9ba16…

MALICIOUS

PDF

98.5 KB Created: 2021-07-07 01:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0943423bb365a8f95308c1229ce2a8ad SHA-1: f1748921a02b640c22920b4922c656784572a117 SHA-256: 301ba378abe9ba1683f18ea7ea74dd8028d2b5c11bb9b357eca034c4c3d669b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these indicators strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160d5af1955bed---48647238150.pdf In PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/73875709434.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/79528712102.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/panagimezuzoresixo.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1eda5286d2---88163771083.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815166daba9---39954925105.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/29696837021.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160a42837a7c56---49173221243.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4d3f4225f---najexisuritefatujojuxi.pdfIn PDF document text
    • https://wita.lt/images/files/23145405715.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/18617280673.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/98210506495.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/3uhmudqvv4h8vmhgi2j477jo0u/kunebi.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/10b4f28401a75033fa0d3088d922e65b/47623215200.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9e6efab8---fusexexapuzegasutitijireg.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f796aa850---zejepakolemixuboz.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/24536091787.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f36020ec1b---7469630692.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609788ee38696---vanozutabuneworef.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/aftrgn3i4pb7logj5rhm5orv7c/raxomabikirijote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=download+sigmakey+full+crackPDF 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_off00011a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000132b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B2 11116 bytes
SHA-256: 089a94d9b63d192faf3c458d80e4df2f2b2037e6a4eae70515a0fbe43ea89cb1
font_02_sfnt_off00014c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C6F 18488 bytes
SHA-256: 6103529693a974fca38a48dc862a13e8137b0c3c32fe62c905e14013e9df4ea4

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