Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0578178f5e454e…

MALICIOUS

PDF

82.4 KB Created: 2021-09-11 22:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2faab8eb07423971e595ce192f5205fb SHA-1: 9072b773f434d81e8da8bd679364e5e97c39f3fa SHA-256: 6e0578178f5e454e4e2a234b01ba35d9e22be6668fa2ac6460f3b5faaa34f148
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, characteristic of a link farm designed to redirect users to malicious content. The ML_NYX_PDF_MALICIOUS heuristic and ClamAV detection strongly suggest this PDF is part of a phishing campaign or serves as a dropper for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://technocom.pl/editor/file/67038176257.pdf In PDF document text
    • http://kroonzuivel.nl/ckfinder/userfiles/files/vaxepokobex.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/38656263919.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/ximujadow.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613065f971bd0---poxedewi.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/bd61b3438bb8c14b62c3cd9ae60681e9/60150133815.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/bapin.pdfIn PDF document text
    • https://bdata.vn/upload/files/7086347328.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/67100512010.pdfIn PDF document text
    • https://olterus.net/contents/files/xepexurade.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b1da397a2---loxanigero.pdfIn PDF document text
    • http://sbairs.com/datas/files/sovusimobepudezaw.pdfIn PDF document text
    • http://vegman-kzn.com/ckfinder/userfiles/files/bezulaxukopi.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/jusiwun.pdfIn PDF document text
    • https://butyfarm.mm520.net/userfiles/files/jixusi.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/cdfd07e6433d59f3e6054822adce07ce/sebavajem.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/7681259941.pdfIn PDF document text
    • http://kezmosas.hu/files/file/bojerapam.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/kimuroxudumijutena.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/nuwetapijanumole.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210901180834.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/10562583973.pdfIn PDF document text
    • http://hoachattn.com/image/files/12053324941.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/60613778162.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/mufazekeribaxojuwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=donaire+vs+oubaali+live+streamingPDF 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_off0000de06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE06 10756 bytes
SHA-256: a0c75df193bc7acbf128ec3ae5a5548c7e5055aa98118f09588cd31c73b44f2a
font_01_sfnt_off0000f6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C7 17476 bytes
SHA-256: 702a83edb239da008087f8bf477c8fd4225b752ddecfde74e9c20f23353cbaa3
font_02_sfnt_off0001243a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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