Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6419d3b31dcfba…

MALICIOUS

PDF

58.6 KB Created: 2021-09-29 10:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5ef26d096f17954cb18c2575f05e6164 SHA-1: aa75bfb9ab880cafe8cb18c9a7f4cb22583ab170 SHA-256: dd6419d3b31dcfba02ddb63015dbccfff90d50c5d89e059fee3b4b1218271b83
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The critical ClamAV heuristic identified this PDF as a phishing trojan. The PDF contains numerous embedded URLs, many pointing to disposable domains, which is characteristic of a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's intended to facilitate initial access via spearphishing, likely leading to further malicious activity.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2698

Heuristics 4

  • 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
  • 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://philly.drinkpoint.com/uploads/files/39425369984.pdf In PDF document text
    • http://photou.cc/ckfinder/userfiles/files/26352857768.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/rabajakedulitadegen.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/fezem.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/53324850911.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/66329998764.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/23338496476.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/48057693481.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/fuduzumurafusutudabap.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/62128086407.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/43772476746.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/dipaxolef.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/woranegimig.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/49645909485.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/zexinafu.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/zirolezabazogivaxo.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/126131671461310dc824022.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/95584716035.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/daxenit.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/38677428981.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/48779046037.pdfIn PDF document text
    • http://bodamvientin.com/uploads/userfiles/file/vudebofoxujipa.pdfIn PDF document text
    • http://insei.eu/userfiles/files/pokezapejitiri.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/musumor.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148b83a76142---sifamab.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/dabuxoderejujemupax.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614c5b1267a1f---33490837697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=kirby+super+star+ultra+romPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB586 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9D 10656 bytes
SHA-256: e09cc71ba91531210358a9ddb40bb1b4bf11b0934643c4518b4c544459b16be8