Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d8cb1e70477fdf3…

MALICIOUS

PDF

929.9 KB Created: 2021-06-21 05:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3306efc80e8bab2a63150868dbca758c SHA-1: b449da793702c3c099d7ad6d3f0a0ddca17665ef SHA-256: 7d8cb1e70477fdf3700c2d84ff74c8e23003d57b16109b352c84dd11d67c8085
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ClamAV heuristic 'Pdf.Phishing.Trojan' and the presence of multiple links pointing to compromised WordPress upload directories strongly indicate a phishing or malware distribution campaign. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather to facilitate the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier clean score 0.1913

Heuristics 5

  • 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.
  • 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://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a20eb7302df---20697907069.pdf In PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c6d821648---93237500000.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/42838c04541fd0eec995a9b876ba1442/vegolaru.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/hsb1c00qsc4qlb6nvs3kjls3t2/tazixinapifimemodo.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160971f58aea46---83976097855.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/2b520c86edc1535cb50420137d346bc6/73078269008.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608807f8c7a92---jolivanazas.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ee1bb324d---31280756291.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/nejok.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/bee428b329bc11699e61dc6507f91b72/28088197328.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/lezezuguxowedabizot.pdfIn PDF document text
    • https://oliogalanis.com/file/fevujogenikabuven.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/67571523003.pdfIn PDF document text
    • http://olympusflights.com/files/files/81022085005.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c337c679e8c---94841149533.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c90bb8f156d---pokofebedozinuw.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/70018395384.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=jung+film+ajay+devgan+mithun+kaPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000e2d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D55 5108 bytes
SHA-256: 4c8691d5e51314c41e04d84edbc2f3ff6887bae6ee90db0bfc7919cd621bcaf9
font_01_sfnt_off000e3ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EA7 10816 bytes
SHA-256: 95133b0ce51ca880dfa45335301b25250855d746a92d869108b1414823c54628
font_02_sfnt_off000e6367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6367 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3