Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc63dcf05c0dff43…

MALICIOUS

PDF

88.1 KB Created: 2021-06-28 08:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 38e7a424ef9860df3c542d5328d300f1 SHA-1: 4a81a9f6be3cb5325107cb1e8ab5f908137461e2 SHA-256: dc63dcf05c0dff435bf8307773bb487cd69fce9e839da6823c58d4e13bd8ce5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to compromised CMS uploads, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of external URIs and the nature of the heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/f9cbdeb621ef42bcf97bbf1aad05aaa8/gapupafopesuzir.pdf In PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/f951a582dfee4d9970fd81a05195450c/64382921380.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad59056423---vozuxetesivubefefo.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a857ebc0cc5---lixerosore.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/lsgvncgi7muaquadr27eseipki/30697558507.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/1c9f96768f7dfa3647452844a862574e/18243351997.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/41111378597.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/27958823490.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/57003641890.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/ruwenufeba.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/78197200585.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ge0bdfpjtr21hm6qo6mlgcb5o4/nasatetofobozu.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/45131784630.pdfIn PDF document text
    • https://thaihoanghung.com/upload/files/30694268510.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb7b8f051d---82505790669.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/7688d50bb6d3afa86f2384fb228a6ca5/64302420594.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d41259c73---36505078397.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87bc1dedda---93392859201.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/65522441988.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/rpkrq5j1136qlo8f8nhjbkn3h2/xefukoveguvanafedamulu.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/bemelurazake.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/bajog.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/0b5f2f336450d15052b43b65186b0def/jujenikupisidaronajabok.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b85d46d87---29068869590.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+do+you+say+annoying+in+sign+languagePDF 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_off0000f4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CD 10516 bytes
SHA-256: 1f25455b70d21642e0ad72661536cc84ca53d6b8676f4d0e34c4cff057735912
font_01_sfnt_off00010ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA0 17112 bytes
SHA-256: c4b5c2b88b6641864b94f821aa435387c146192376ef6beca2e3190e9fb14841
font_02_sfnt_off00013909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13909 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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