Malicious PDF — malware analysis report

Static analysis result for SHA-256 76346d5cf7c069ec…

MALICIOUS

PDF

77.5 KB Created: 2021-09-08 22:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ba5ba7e67bc6c8044e02680f6986bbb9 SHA-1: 809eb832ee5bb00a7555f0ade5725017ccc55248 SHA-256: 76346d5cf7c069ec5768bb50b553626205b0c55a579f854dafccf22752a68ca6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs pointing to various domains, identified as a link farm, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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
  • 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://universal4shipping.net/userfiles/file/zigetariwubudatipomunoje.pdf In PDF document text
    • http://nuovojob.com/userfiles/files/83017144227.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/wevumavorove.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/fufunazuwus.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/nunumugaxevose.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/53826514557.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/45333158485.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/puvekupajufodalopiniganes.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/89286303378.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/tikoludula.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/34343643735.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/gasulixug.pdfIn PDF document text
    • https://duel.pl/userfiles/file/jikubamomokakamo.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/30664099697.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/torazodokezawevukab.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/43145100552.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161314588f0924---5656447693.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/46059331460.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/51466980212.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378b83b1f7f---jimulevetetamivu.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/lemofozefaja.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/wajorikajapubel.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/1535983958.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=eee+pc+dual+bootPDF 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_off0000c925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC925 18436 bytes
SHA-256: 3e201f1ca69e3949ec8af162457691dc86314f88cee01ac5367026416ee64df0
font_01_sfnt_off0000f92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11143 10264 bytes
SHA-256: c4751a20f9284a339781027839fae17e142ddc1aaafe00dc576f8574d645eb91

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