Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e5e184ae3c242c…

MALICIOUS

PDF

120.5 KB Created: 2021-08-11 03:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 952a96f25c2360276ec256c7ab83b7c0 SHA-1: 27e50129dc34607a6129ebc234727aef6385d5b5 SHA-256: 21e5e184ae3c242c42bac4df6759df3c8103669fcb76237ea16b11ef0ffc3ff2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://chinahongji.com/d/files/53734740027.pdf In PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/a2e625406aaccb8a900fcf999bf0f3b9/sapuwemixidanekexeluvede.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/62670723304.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/25720971278.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/d8db9ad4835fb17dc6440c8c7ded938a/xexarazifikakaderufite.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/f7d3c2biqe6s0kurqrrrbnmf4r/rekokagesevufore.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a94828cc84---diziganogukiwo.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/86015304825.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072973be1fac---17669337295.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f8e49db63---63589958069.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbe11dd1c6---jukajuzaxadelejumudarowi.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58ff5bfb75---92335676391.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aa7e8a3a1---31987922639.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ee7e374c8---632193362.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/43278459535.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/8jum361cbjh3ml72bnkoat6ff9/roxoxu.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/50006767418.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/61cbec497626029d32a7c519f26ffe03/sowigagaxefameza.pdfIn PDF document text
    • http://axwelindia.com/uploads/nepopimomigabofifan.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210709_A8BD67CF8F651BFE.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160859d5d88d53---95167405700.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/302a370a51c969f8590125ca885695c8/67717848558.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/15369295997.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=%C2%BFqu%C3%A9+significa+el+d%C3%ADa+de+pentecostes+en+la+bibliaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15633 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E4A 11348 bytes
SHA-256: 699b11128dbc2ba437e664282dec00aeed24d09497ad382e164fccca5a2a51a8
font_02_sfnt_off000187f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187F2 19044 bytes
SHA-256: 9448eeab81d0ba3a44a5ba4c1c181cba487bd2f23a819c27913df05b72bc6221
font_03_sfnt_off0001b8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8F6 16488 bytes
SHA-256: 71f30a9f3f2be03344d5b1fab4711a19c0cab956f3e2c44d6d1ae103cebfdc45

Open this report in the interactive analyzer, or submit your own file for analysis.