Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80dab16c659ac90…

MALICIOUS

PDF

85.6 KB Created: 2021-07-02 10:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f6820dd71e99c8dbbbed578b2e8b0da7 SHA-1: 2b7fa8c9167a2201821f49aa55f6a81390543411 SHA-256: e80dab16c659ac9051bbb770d2e106e251cc2df9e6a8a4e3e70c83c933d4e048
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. These links likely serve to distribute further malware or facilitate phishing campaigns. No scripts were extracted from this sample, but the structure and URL patterns are strongly indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5967c0b74---fowovugulujokukopuzap.pdf In PDF document text
    • http://worldcar.jp/userfiles/files/jodekozasapixojoxuz.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160892b3b79065---mugade.pdfIn PDF document text
    • http://belst.by/upload/file/vumizizoladutage.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a91b678aa---49097239450.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b00c78d0b70---88543392571.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/1d57ad4fcffcfb0c1e820abd66684238/65720971713.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/mrovvans5bpk0c0jtcrqv10olu/satilezosimixora.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/69720002956.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/1d5a34cf7c95a8f53f9f6a1860da67f0/rulovuwujifezoxovuj.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6c677d48c---bepogot.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160732bf8e3fbf---59743069382.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/e5f19f2290fc951a68d61436dd4d5bf7/29985983320.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/nozej.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/lexefun.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/9527a276dfdcb481099476daa816be16/savobipuwezuril.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/48158c1fc044b5eda13b98ad1cc9493a/55578746678.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/3cd97cfa79211dc8189b4054fbe00514/lejevemewaledaz.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2ecde3868---95694086045.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4c927d180---99625461425.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/90dhko4g31vi5kdglklrporv86/17946061126.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/23235613293.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0efc47cd87---36369047907.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/nowefetejagikirudibax.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/41424193329.pdfIn PDF document text
    • http://cityhighclassof77.com/clients/9/9e/9ea685038b5a197d2022a69b8c6b162a/File/93087816563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=parts+and+function+of+nephronPDF 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_off0000eab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 17436 bytes
SHA-256: 923e9c62d4c4bd1cb0aabcf428d6430bdf6329210c7f5f543c55e76a0e2380c1
font_01_sfnt_off00011859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11859 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13070 10772 bytes
SHA-256: 4640817fc992bca32409aaa43180ea6b8ca543fc5a177d03c5d94810d6be042c

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