Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61967940ae94e26…

MALICIOUS

PDF

85.9 KB Created: 2021-09-11 21:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 779928c3e98061e3828ab550d05be4fb SHA-1: e92fc689d49846eac88da9393936eb21a0c066de SHA-256: d61967940ae94e2671e6d641494627fe192ac0a508c1959d355b68274e8f1d59
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The presence of embedded URLs further supports this, likely serving as lures for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://pixomot.ru/uplcv?utm_term=como+agrandar+las+letras+del+teclado+android PDF link annotation
    • http://globalsublimation.net/uploadfile/files/fekineteze.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/tufamexopuvoluti.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42625146046.pdfIn PDF document text
    • http://dsagco.com/Upload/file/wiwun.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/26419141250.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/81285335412.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/99851730176.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/fererodupob.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/43273901346.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/ridukomazofuxewezewido.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/67770462325.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/90961655157.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/76137518241.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/zovujoxuvigimal.pdfIn PDF document text
    • http://yoron.net/up/files/5004957079.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/35492922506.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/84412389001.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/56d91ba7788e44e9b05f7755df8a6d56/76472025487.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202109010927343258.pdfIn PDF document text
    • https://mjrspot.com/fckimages/file/95568188351.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/zewitogelexojisejen.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/mibomufajaniromepa.pdfIn PDF document text
    • http://harlit.com/upfiles/file/pexipoxivefabutevadex.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_off0000e0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D4 10744 bytes
SHA-256: 5717f2c514e7368e3fd93e8d825902d4c97a73592d737a0fe43dbeea66229d1d
font_02_sfnt_off00011154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11154 21468 bytes
SHA-256: 9b5b92a91dbf8e38cbc3e9d40fb03d656dd831917fa6b2e8029a630b1c3bcd43

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