Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2b42f6a12ba966…

MALICIOUS

PDF

69.3 KB Created: 2021-09-29 13:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2300c2383c16bdaeaf36f52e8025c73c SHA-1: 85962bcd858d75d0fa4cefe2e7f8ef47a8c10633 SHA-256: 9e2b42f6a12ba9667a33e54a9be1c1029b46660f346575edbb6467ba449913f1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to a link farm strategy on disposable hosting, reinforcing the phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=rbx+free+robux+2020 PDF link annotation
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/lesagudo.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/zosalumekojad.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/64653958211.pdfIn PDF document text
    • http://av72-reklama.ru/userfiles/file/16315448327da8e5ed4f7a6ea4c8.pdfIn PDF document text
    • https://efnnma.org/files/file/57690461052.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/xuxapudevolaguxozapu.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/mesezurezadojuwetiwiva.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/10964761989.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/mafozuzer.pdfIn PDF document text
    • http://napiarsaigh.com/images/21802158261.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/82928133569.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/94820559407.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/28235950331.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/20592655589.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/lurim.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/19625491872.pdfIn PDF document text
    • https://abbma.in/admin/uploads/file/gibapusurogisag.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/80861949032.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/kevc7frdb0a9ofoca9sappeuq8/zogowafopoparu.pdfIn PDF document text
    • http://ssanadia.in/userfiles/file/xuxijobe.pdfIn PDF document text
    • https://parkerboat.hu/js/ckfinder/userfiles/files/43261149748.pdfIn PDF document text
    • https://ayurmitra.com/files/file/virozabefevolikoxijaz.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/basufirinilufegoxubeni.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/80249131769.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_off0000af9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AF 15804 bytes
SHA-256: a58fecf3c972d5b579615a34f54510aa4b84e9941673f275b6fc2ca879c214a4
font_02_sfnt_off0000ef85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 10168 bytes
SHA-256: bdf3f4190afdb82f44e7fe5e56d034fd5387feb3d4b6b445261d12dbd0a053f8

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