Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e562373958da33…

MALICIOUS

PDF

92.6 KB Created: 2021-07-04 04:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d7e30817c1de3bdca571d70b4cc39397 SHA-1: 5239c6315fc0b76a314049f89a3d97b8f4cfe189 SHA-256: d6e562373958da33bb7eeba19d13d31388b51a18974582cc06515be3c517aa4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and link farms points towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://garglob.ru/uplcv?utm_term=anything+for+you+sarah+mayberry+pdf PDF link annotation
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/1b073d3fbcba0882aeca4c3c5f3887a0/lugekebixunevufofu.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607231267c8f8---febupagubuvugusab.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160944342c87d7---kezemasozadanuvuve.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/780ddf40d83bdf2a55b8af5c6c1edf36/82061090812.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/wonogaxigafeliwi.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/tidogo.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/jisikikeg.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad032ae84f---bofuve.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/3adebc824f951a9b6af00292a3c49848/torivurujinotiwofemi.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/nozoremosexeb.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/0aaf580280e8b3c9b2b0fe2b56811e20/wutepi.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b111ba891---vekevopobe.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/dq8urmhn9eo51nbshj5gp2tp1b/denuzimigef.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/bugugopanij.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16085e670eb965---75240206780.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160877d7e3e095---90397874018.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16087404abee57---9287173875.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/99cc88918e2634ace9037ed5558a1e20/32675425800.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/93943922377.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa646c944f2---rixemododelef.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/avvuqqfjkle2l2mr6q3u2q2rom/mukotamujon.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608db5152363e---59272805581.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608103842badd---17538679776.pdfIn PDF document text
    • 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_off000106b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B6 17100 bytes
SHA-256: 99c89ce41a4554e8cbd7cbc07d5e21e13a8c2284f70f7d0359b0fc00ac9f7cd1
font_01_sfnt_off00013344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13344 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5B 11236 bytes
SHA-256: 37fb4d8421658ce138de5daa7e698bbb1ae4e38b464dbaba542edbb056c76e86

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