Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08674daaa8557e7…

MALICIOUS

PDF

81.7 KB Created: 2021-08-30 14:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 71385d46966a91000e88c96a066ff896 SHA-1: 37fab92d894a15d17fd2034cebc9aa0c7902e936 SHA-256: d08674daaa8557e785d488a2ed019967258e4a59545bde4516e2cb52cc633a05
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable hosting sites, a common technique for distributing malicious payloads. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a method to evade gateway scanning. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://honda-vo.com/upload/file/wovexixubogiruni.pdf In PDF document text
    • http://worldprint.su/userfiles/file/datuwibanom.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/xevalolirisivipude.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/rifelaxopixesagepurezuvol.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/53620822e5ff8a5d6261911b2fefb297/votelubojofevoxokale.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b643599d060---99653274996.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608265aa65b6a---99464203518.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/be93b996716f9e56aa49a5e755097c44/37699388363.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/mawudevujeda.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/pezonujawefasilubap.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084962b85001---78022229238.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/8hjtiekin70341aida0jfhred0/16516175829.pdfIn PDF document text
    • https://datajournonepal.org/files/sugidibo.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/45458276852.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/lavesuliki.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-6-25/20210625092751138997.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/nanadopa.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1611f6dccc7756---78858893848.pdfIn PDF document text
    • https://demo.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/supetikedujaxezodixipen.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/50029343767.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9a43e1cd6---86868226348.pdfIn PDF document text
    • http://dgn89reunion.com/clients/862287/File/64751312661.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/jewujagasegefogobajolu.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/71251555afcf880bd6e42f4baada20de/12568987804.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=fun+animal+quiz+questions+and+answersPDF 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_off0000d90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90B 10780 bytes
SHA-256: 07da8526a71ab4b92f180a899d78f5ea5befa8315f7ac33d7929cb938abc67ab
font_01_sfnt_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 17740 bytes
SHA-256: 3675c1965412530f7e5ddf1f3b3695858f5507287b1b27e53ad8619e0c60b31e
font_02_sfnt_off0001202d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1