Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d83e12e3833c305…

MALICIOUS

PDF

73.4 KB Created: 2021-05-12 11:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: da30289db156119679a9b75ba0c32ee5 SHA-1: 3ef891ad6d5b11ac111dd2320085e39ac1b96dcd SHA-256: 3d83e12e3833c3059871cf59aff8aec560cf4624aa36378f84270ddc1ddce313
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://camile.vn/wp-content/plugins/super-forms/uploads/php/files/kbg429tqbas226eegg754b1r5l/lizabozu.pdf In PDF document text
    • http://www.awakohchang.com/image/upload/File/emiko.pdfIn PDF document text
    • https://bursac.net/userfiles/file/30895603186.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/7fe633faf7801de3479d0f3e410569f3/viwubojadimokitukufoxino.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/15716534094.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/98317076682.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6262f3bf2---kipadirogebezonipapu.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/76103688201.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5bf16592060788fe59269fc455c4327f/ruxefumorakapize.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160748cc051170---42624722122.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/pazepavaxumibinoxif.pdfIn PDF document text
    • http://abpaluso.com/upload/file/84276247160.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/jimuwivokejide.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/pekaxiferujamovoxogutuval.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7bb7b2ff89e50a5dc1a3ac6a9ca8701b/88892095004.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/vupapulijivexabo.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/140ltbvmlfin3cmloq4rdmvpb4/61967221424.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/FevRqgeaUVY/uplcv?utm_term=aimovig+product+information+tgaPDF 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_off0000e31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 5312 bytes
SHA-256: 4118b82da09de5ac8e6d57b6edf91922f82ad12d2ff674e6a48001708f0feadd
font_01_sfnt_off0000f528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF528 10420 bytes
SHA-256: edfb4ef8cefe30b8baf680dc6231699105f65a716d151dc6c42af5beae0960e3

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