Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb6ededef2023cf…

MALICIOUS

PDF

93.6 KB Created: 2021-08-08 07:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ae7c895f77b7c8a32db44982fce69a07 SHA-1: f678ee35f66793aa5fcaf5ce34d163e55639e6da SHA-256: 5eb6ededef2023cfd04b0615203712f8fb70686c07e52d31cd332b8043cdeba9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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 https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f67e8e21e7---86075094338.pdf In PDF document text
    • http://pc75.net/upfiles/file/1621367607.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/66385765238.pdfIn PDF document text
    • http://sam-global.ch/files/file/65691573388.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a60ab07067---xujumelopomitiwevufefiluv.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082d88535000---zepuna.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/56b0vu8e1umi3538kqqa9hr594/nepifiwesanutupupi.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/sexixuf.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/beguzelig.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/82714220813.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/13659977126.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/17883523920.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/59167959321.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3971eb85c---dixikejaluzasapa.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8c5ed4303---rujamajudakuxojiwa.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/58998497343.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/a6oo7n1ocg46ufki7pnpd4idi4/ralodiridekawak.pdfIn PDF document text
    • https://triosms.com/userfiles/file/68060120470.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/a7e9bc98907eb094d51ce3425d14441f/55637681531.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/mimumiwedigev.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/183358763760a03615ea530.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/74dlqcc331vpmvpe27mnfd97f2/damorafa.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607394cf216e4---jodojezidomisu.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/861425cedbebc3d3905529a28a37edba/72074103826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=free+background+music+for+video+editing+mp3+downloadPDF 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_off00010741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10741 11596 bytes
SHA-256: 138834dcc59dd842b6a58b33b77878773294faf31fad926f93ccc65f475ab585
font_01_sfnt_off0001227c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227C 17704 bytes
SHA-256: 60989c9915a6bff3d77b0497f6db30e37282b07501cd0ebeda19d6a22ba5984d
font_02_sfnt_off00015034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15034 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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