Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5667e3c095aaebc…

MALICIOUS

PDF

83.8 KB Created: 2021-09-12 21:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ac338ebdf34a7538dc648103f6e30574 SHA-1: 3faace9ac90456cd3c2c1faf4af87d1dab3e41eb SHA-256: e5667e3c095aaebcf0b6ad8a2c03121f8a8c63d59c2da27c9ade1c38469363dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://burgaseguros.com/userfiles/file/53667295528.pdf In PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd31c6b4cf---85949076743.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/webijotulebejas.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/92145217693.pdfIn PDF document text
    • http://stl-hk.net/userfiles/bixorezu.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133439270fc2---18480882412.pdfIn PDF document text
    • https://kamionosnyelvlecke.hu/userfiles/file/populasezijopipuxizet.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/gugopitiwebivetilakikeji.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/08f9820d8130dcf9670ded623f677614/12027095461.pdfIn PDF document text
    • https://dacola.com/upload/files/30755714135.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133c38888fd7---61541699881.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/10020573423.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021090222320432.pdfIn PDF document text
    • http://timebymtm.com/upload/files/lodegara.pdfIn PDF document text
    • https://successstudio.net/userfiles/file/60946329413.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/nutevevuwusepeze.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/q02ve6acki8uma51egs0d8itlm/pubakurofitug.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/81903937587.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/45572337901.pdfIn PDF document text
    • http://rem-proekt.com/f/file/wakilasakomutufurusonazan.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/18360880922.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613013fab37d8---88538302732.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=miui+12+poco+f1+globalPDF 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_off0000dfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 10456 bytes
SHA-256: c6d042f7dc9338ac3246333afd952547773ff8f7e0fd913ed6e4b3291d59494f
font_02_sfnt_off00010faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAA 19128 bytes
SHA-256: a17b60d797843b8b1cadb77898e3c1128ce9f4d62aac4cc8761856139c71d7f7

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