Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46776d66ad9f5f0…

MALICIOUS

PDF

91.5 KB Created: 2021-09-18 09:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e9d468a387b9a12fed9eb53874471cb2 SHA-1: 330b073621fcb37b814587a0687e56b91b2eb20d SHA-256: e46776d66ad9f5f026908a3825c56ab15d93cf110d7f1884cd889be7d2f57f73
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of malicious documents designed to lure users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 https://philabc.ru/uplcv?utm_term=wear+os+companion+app PDF link annotation
    • http://soles2walk.com/data/file/46089062402.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/96963066879.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf2963b1ea---bozegepusixegotep.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/gigenomujupepumidenafev.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137d8b06364a---83816542896.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/09/202109181156298990.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/40714381288.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/71656004633.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/xexud.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/zagowili.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/guxajegeninuzanogadisuz.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/56055941161.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/58027418335.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/dolapozevolewamaruliv.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/vidogukesowejoxul.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/kisog.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/98754055048.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/a8cd9e2057366be36295861898e7a459/najaverowewubolifax.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/bupoxuzomajejijenofagif.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/figipu.pdfIn PDF document text
    • https://labelmarket.pl/data/file/4915994974.pdfIn PDF document text
    • http://ruihuitax.com/files/file/mekegunibeju.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/zulerenilogisaseberegar.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bbfac072b---digox.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/41827866734.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/48518658630.pdfIn PDF document text
    • 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_off00010227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10227 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A39 18016 bytes
SHA-256: 222e5f839cb2eb2d59cd8f2fd28ff3726fd1beaaf7e024d40704d78c9b5b6abd
font_02_sfnt_off0001489e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1489E 10384 bytes
SHA-256: fd8fefa080c2051a3e7c33407640f527d7f655ee42c8bfa7e3aa3ff9f4fd1a2f

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