Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aaabf585c0ee70f…

MALICIOUS

PDF

97.2 KB Created: 2021-08-22 05:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 5fb59ca7296b36aeb64c1722a374d99b SHA-1: 486b62d9a0e7b960d6a4aff7f4382fd63551059a SHA-256: 1aaabf585c0ee70fb040408dd7689b022b109b4b3315fe8615f66fabf7957d3b
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific content or purpose beyond the observed URL patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160beedddc9904---bofunafego.pdf In PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078535551d0f---45532150212.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/suvipumumezoviforixojeful.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/rizekizesuxelu.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebe244e50e---juduxomokerolubekilefufi.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/wegivonek.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/95494470443.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/54961305545.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae71aa9724---29775384324.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/frv21vtujgr5loqp3b018ac4n6/26529111433.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021072009301614.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/rotagopijow.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ba3dd6fd8---59611760242.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16085e0dec4cc0---74096552764.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c06a2c8267e---wusoripoxofevujiba.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/9186c7c3bdbb90c620e9d53dfe485175/52180306430.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/r8cjd864m93ln9ftfadcfja9nj/lododukubugusodutoj.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/24126479795.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/esqnpu3vpkmelpq7an5ve07ai5/27715030237.pdfIn PDF document text
    • http://absigorta.come/file/pibidoduwaf.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/ketoxokuj.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/73546807731.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/28832450866.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607449ac7e998---22639618188.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+the+cause+of+sickle+cell+anemia+quizletPDF 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_off00011278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11278 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8F 10892 bytes
SHA-256: 469c395243bd2af1bcbd5624d9c122af0cad800fd67c8e59c7bd3ac46591fe05
font_02_sfnt_off000143a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A1 19228 bytes
SHA-256: 841f92a94d9e958f0a04b460973e17eae7b9f15aea7823ea71a33d7981d7525f