Malicious PDF — malware analysis report

Static analysis result for SHA-256 471b8278f32e5c89…

MALICIOUS

PDF

84.5 KB Created: 2021-07-17 08:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 07194826e16f0b644661d57f8540407e SHA-1: 5757a26b4104599bed514d1e83ede99ec4d5cbb0 SHA-256: 471b8278f32e5c892d3cb38ca664c4d30a3ebd95feb5a4963d778a213bbcfd34
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress uploads and disposable hosting, suggesting a link farm designed for phishing or malware distribution. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://activesolutionelectric.com/images/file/81624371265.pdf In PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/8vf1pfae6stj7nlkd4sgio7lp0/nofamifuweruwesuvikezole.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/levuriwagofikafoji.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160f2435745e0e---febajovonos.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/v7qfh72775bi855vm2q9jr727s/tabejirosim.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/vodv14qa9ld1c62pts2r3fs13h/pazijijebekokomawek.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/buwara.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/tulox.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/vuxakogupapibokebasaz.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/55300278681.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/nejesixodogagijakoji.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608fed49686d1---39811027012.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e3b0efd85---93982174831.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b54f93f448---tofitijogibefeve.pdfIn PDF document text
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/xuxovivoxepivuwefurobemi.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/giranuxizog.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/3509040677.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/44432110556.pdfIn PDF document text
    • http://millecolori.it/images/file/tozusuvidemomajagepi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac91cb6e2e9---33547689624.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608509de5b0ef---86438441409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=healthy+vision+month+2020PDF 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_off0000e813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 17080 bytes
SHA-256: 4fd8d498db134b69e780fd9cdc20e0578666adf3faa184acfe991f505b527ac3
font_01_sfnt_off000114ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE5 10684 bytes
SHA-256: 31fb0f3f3144baaa5c52dd1757f0f26bbe6a2cf536c6e6179d55d5eb4563c7c9

Open this report in the interactive analyzer, or submit your own file for analysis.