Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f019cbb4c40a8d…

MALICIOUS

PDF

92.2 KB Created: 2021-07-17 11:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: f773a60660a5ea1f43cc030677b82479 SHA-1: 3a176b4497b0809df9a4e1dfa3ebab8af44e77a1 SHA-256: c6f019cbb4c40a8d34a36c4e3df895dcb212e2dd8e1335cfbbf52388c2e8a4cd
176 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 0.9850

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://moneymaker-gold.de/files/soziz.pdf In PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e2c0fbb086f---karip.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a737acedda6---75457876860.pdfIn PDF document text
    • https://hoavily.com/uploads/files/virowe.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/3ddd78b86de04b1524e5a945018f849d/96964981359.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dfd68ae60---mokujumuderino.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/84687988290.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/658e85d5151e2d1b6a01507c72201515/bexenuwapapowap.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/64273652986.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/72430338450.pdfIn PDF document text
    • http://talleresjpg.es/img/file/gapivagefebifexape.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/garorezu1620439655.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076344493452---mefigepawevebolejolif.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c993c3f62a---vogotefux.pdfIn PDF document text
    • http://sireny.net/share/files/51666508447.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/werikimapuputur.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/93735745963.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/70024232216.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/42401830892.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/moketevunemiditimi.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/5unmd0700i0linhoe91cdt5nc7/mafurevi.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/4qodnkikuhlet7es4qoa367nf2/80841992236.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96233f1ae3---gilizatasexenupator.pdfPDF link annotation
    • http://ascensionchina.com/userfiles/file/36354322388.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077db409209c---tezoraburifakupujexum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=sublimate+in+a+sentencePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD818 2732 bytes
SHA-256: efc8f69a011a4bf5350261a34b204c2b1e118d2b97c005521594f5b08f5f66c2
font_01_sfnt_off0000e3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A2 10488 bytes
SHA-256: 8d5f9586e9bf8f6e75bdd46e57920f0ae4bc4385b062cbc1d665cb2633651db3
font_02_sfnt_off0000fb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 20772 bytes
SHA-256: 6a9d5fb8d1fdcf4629ae27c110b7302ed89ece3380460849bd08531c60368946
font_03_sfnt_off00013147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13147 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00014958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14958 16672 bytes
SHA-256: 0e76a88a93e6c4a958b81e48bef70a224d22c1b40add45d3bfc74af4aae4ac90

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