Malicious PDF — malware analysis report

Static analysis result for SHA-256 510347854773a757…

MALICIOUS

PDF

82.2 KB Created: 2021-09-16 21:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e3004abfeb8b43d1b45b0cc01564239d SHA-1: 00951c456dcf6e3b9d38fcbfc09265fdbc88a301 SHA-256: 510347854773a757e71e1f568ac183fd0b3c69ccdea95a6fec81a2d743aa0c46
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm or redirector. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, reinforcing the phishing or malicious redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://responsible-tourism-alliance.com/content_file/files/71203609767.pdf In PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/dopiwoxalowikejes.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/79351266712.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/62917440132.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109021911482723.pdfIn PDF document text
    • http://accronline.com/userfiles/file/pizosatutuxanedovobuxi.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/xijimajugaderoxijax.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/zowejusamumudomomizita.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/55886843281.pdfIn PDF document text
    • http://vidiniaibreketai.lt/userfiles/file/75917032593.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/wukezorutupuguvisinud.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/zulifudaferuse.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/xofivom.pdfIn PDF document text
    • http://newo.ru/files/files/62739483480.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/monosebipipopusogaxizofun.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/32968057145.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132cca20292b---44738863943.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/xuzixunivav.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/86829217374.pdfIn PDF document text
    • http://selidbe-beograd.info/files/xemofomusamo.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/19045057900.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/tamijelagokefisado.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/sutukiridaporutugilifi.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/padoxebezetad.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/084a1efb6a08a0d4001f5132b199084c/nesiwixolodalubajidone.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=halley%27s+comet+2061PDF 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_off0000dc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 10696 bytes
SHA-256: 7460ea175ed27a3f41da077ec966dc186911343778bf2a31a25149c2cc63971c
font_02_sfnt_off00010d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3E 17748 bytes
SHA-256: 10850c24563500c15e69ce7c602570b1c73054615013cf7cd1daab46c05b1f80