Malicious PDF — malware analysis report

Static analysis result for SHA-256 396d7febd179c3bb…

MALICIOUS

PDF

72.2 KB Created: 2021-04-29 11:34:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2379561df3e0c833bc8864a052f35e0f SHA-1: 297e31c9b9b54563a55bf62d696da1d346a6eac5 SHA-256: 396d7febd179c3bb19e5891839c2dff2fe68419233da258047348707651daa7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, mentions 'Aurora 3d text logo maker templates', indicating a lure to attract users to potentially malicious content hosted on these URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608243e807206---repufowulusegizawov.pdf In PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607596f5d0686---2969685304.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/905197245db580a31b7fc83f81e8c2a8/21598325797.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160759be444266---dalotigerukavuro.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608059541deec---71643733537.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0ca997cb7---gefubosaxewagisazi.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/7738f797ebc6b896651c943abd07e2c3/xatulirovozewalaxopokik.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/243acf737dcc08bdcb9be0534bcf4d32/91540096535.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/c89343c354320be2877b5f2e057caf0f/2314923708.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737299e9142---lomoniwigobefuxokapek.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ktt36bs2bbuborqlrqvpctn25o/tagowivolewezofikufapoti.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607a49774c07a---25329343844.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607972cb4474f---58926835731.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607599eb75076---kuzizuve.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/7909bcef7b539225db0cde4bd4df6ebe/67319511904.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607baf5917917---73881569279.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/debl6m1vn17dg8igdk395hfjvn/78806230117.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=aurora+3d+text+logo+maker+templatesPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB53 5564 bytes
SHA-256: c79caf6827512e06612ad8e7744211759ec640c06cd474ab0ca67f41bab8aaec
font_01_sfnt_off0000ee2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 10600 bytes
SHA-256: 90cea8aa942afd59340ed2c2c81a0514bc188154556d3094d15082b2cc24804d

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