Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ca1a48a0376022…

MALICIOUS

PDF

74.9 KB Created: 2021-06-20 22:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c9a021b872055dd862aba3c3ebeeb98a SHA-1: 0567762354da061225ee4026990fd6a22fe8daa4 SHA-256: 54ca1a48a0376022ea0f4ef3fe8ad305967d98be6c80110f3389cec76ebcd315
156 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to compromised websites, identified by heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. The document body, though heavily obfuscated, suggests a lure related to meditation scripts, which is likely a pretext to disguise the malicious nature of the embedded links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096613458bb9---vonitixivusefimubo.pdf In PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/0k8uu6e04oodhd610gd2k4k3l7/51852302546.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/towepibaj.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/mokojimorewer.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/a40nvr83gurhkc5eu56ddcrsdt/takaw.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/279fb254bf5becbdb56951f3e1e26a2b/91399182827.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/l7s83k5j6kbrcad9i1kqvhvko5/mamiloniza.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/tebuwujilixarogova.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/99350162510.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/53539697637.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/62337986840.pdfIn PDF document text
    • http://htwy.com/upload/file/javaluwamufu.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/tnr7pbuurg1a5m0mvdt92551oj/disiwonudixotomavik.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/t1ipvnrmojdqspqttf38ip4vsn/zepakoga.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/ef468d1aedd8425dddc91aa216c45eae/54933776865.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/~3/1xuhb7AK25c/uplcv?utm_term=third+eye+chakra+guided+meditation+scriptPDF 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_off0000e941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE941 5568 bytes
SHA-256: 43beb365cd31dc044fab4be6a65dac54ceaf71c6712affc09e614b2ce477f425
font_01_sfnt_off0000fc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC16 10208 bytes
SHA-256: e589213ae4a0324f3e2ddbbaec8bd2d23d612d4882a90526ed90238d9859068b

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