Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e7125c7815f840…

MALICIOUS

PDF

84.1 KB Created: 2021-09-09 05:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: ce653acbd2de753d38ff261893b320da SHA-1: 4bafd7f8e115152028559b02f9bca1189d7b8106 SHA-256: 26e7125c7815f8409b38a0c401f6b5215c34d160da3c937773c7025a40e4545d
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://hanifeugur.com/image/files/mojesisawe.pdf In PDF document text
    • http://smolninskayahotel.com/userfiles/file/demubovopuliwul.pdfIn PDF document text
    • https://exam10.menapoint.com/app/webroot/upload/files/36687304709.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/jonitupinu.pdfIn PDF document text
    • http://e-sheremet.com/img/fezebunedojepunejew.pdfIn PDF document text
    • https://10fci.org/userfiles/file/wubevawod.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/tuxilurodefiwibinokefim.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/puzefimimoz.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/xoginitemuwixe.pdfIn PDF document text
    • http://kozelsk-adm.ru/files/uploads/files/98005073008.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/rajapijus.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/zelupid.pdfIn PDF document text
    • http://phongthuyphatloc.com/luutru/files/fajugomorezetofisusabile.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/50745939096.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/69061775075.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/52851128566.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/8208487993.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/begavuwivodokezosuvum.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26561355944.pdfIn PDF document text
    • http://joomlacode.org/fckeditor/editor/filemanager/img.php?file=file/risid.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613062b02a26f---47218364791.pdfIn PDF document text
    • http://strandedtattoo.net/file/31250823373.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130446b33d10---fuzajiduborelumuvobifug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+watch+new+season+of+rick+and+mortyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE345 18108 bytes
SHA-256: 20b3dcdbe16822cdfa22e46f9439f36b4edf944c9547b3b7da01d2529e094e0c
font_01_sfnt_off00011174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11174 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001298b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298B 10976 bytes
SHA-256: 513aa00c1e2189a9b19fc58a37ae0a6d95299c18c86e84d483e5ff81b30c4c4e

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