Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee80fab9e3a4c4d…

MALICIOUS

PDF

81.3 KB Created: 2021-09-09 16:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f7be8567237671a6d8340a5f3a8e5904 SHA-1: 2ed42222648b8ee91dff42581717e972743dfb83 SHA-256: 5ee80fab9e3a4c4d1a49205afcbbe70271d8412642fec0c10f9316bae44a2cc9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to unknown or potentially malicious domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://tarsiman.ee/files/file/repupiwer.pdf In PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/1607987531.pdfIn PDF document text
    • https://12shio4.com/contents/files/93290634947.pdfIn PDF document text
    • http://whuntex.info/userfiles/file/37326141742.pdfIn PDF document text
    • http://sbairs.com/datas/files/sebuzilalirijaxidabobeve.pdfIn PDF document text
    • http://khocabien.com/uploads/files/74358541218.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/medigov.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/xomenuji.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/60684639261.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/80937231809.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/54162755730.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/wozazok.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/rawuzowalejipumomubadiwu.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f212cd1da---71910863810.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/30729295327.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/19947119279.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/94555788538.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/jaribiwupuwip.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/gerufarawimawozunoxor.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///21682106767.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/26036828837.pdfIn PDF document text
    • https://ultralloy.net/upload/files/tizupifofuwurumugegirim.pdfIn PDF document text
    • http://tolaniprojects.com/userfiles/file/67200737424.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/57347997986.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kogodikepapive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=mobile+screen+mirroring+on+laptop+using+usbPDF 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_off0000d746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD746 17804 bytes
SHA-256: 46461d42c4148b06dc33aea7780e34f04b67c83034b844c4dcd9a3fc78d74547
font_01_sfnt_off000105b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 10952 bytes
SHA-256: f23f88f5a46b317692bf45bed0af4a48bd11c0ed2e2ebf71e1abce0e5777e2e0
font_02_sfnt_off00011ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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