Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad6a0c5382e9ec0…

MALICIOUS

PDF

94.4 KB Created: 2021-09-09 16:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 58e4a589c98bb467102932f297dbbd44 SHA-1: b3bc56ae5d5511103f7d10fd5af093fec4a95636 SHA-256: 2ad6a0c5382e9ec0914370102c58a3def5c8d39328cf85bd914f9c03181d0a5c
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 0.9965

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://smidgel.ru/uplcv?utm_term=mejores+juegos+de+habilidad+android PDF link annotation
    • http://djk-winkel.de/images/uploads/file/21037754822.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/nusosetanudawokox.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/64122827454.pdfIn PDF document text
    • http://altinay-law.com/images/file/46623779385.pdfIn PDF document text
    • http://pincesorvarshop.hu/editor_up/37146213748.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/sewavevak.pdfIn PDF document text
    • https://mcq.bmtinhoc.vn/InteriorWeb/images/images_news/files/jadew.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/69959401090.pdfIn PDF document text
    • https://ltes2.tw-goods.com/UserFiles/files/fuxerelenovogi.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/80595474476.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/kefetedajopowo.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/54534581470.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/fabinirizak.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/ginudojapujamilot.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/49740044572.pdfIn PDF document text
    • https://alutat.com/data/file/74813122017.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/35964818161.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/8801474549.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/82981185647.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/barogipisuxekujexa.pdfIn PDF document text
    • http://kmsenior.org/file/files/65912110690.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/gelopixexegoba.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136973335129---rebes.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/6277ab6451d720f9a669f91764d41baf/47869007059.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_off00010999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10999 10792 bytes
SHA-256: 3fb5e95ba0157653a0e5a65b523c1ee2caeb47e7644e99b9db45eb2b5bf62941
font_01_sfnt_off00012210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12210 19688 bytes
SHA-256: 2de0f94c3561add9fa396d72a4eb4bed2191a77eac89d1982d978f5e22c48f07
font_02_sfnt_off00015398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15398 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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