Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6abbaf76802d7c…

MALICIOUS

PDF

93.1 KB Created: 2021-06-12 00:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: afa68c56e5660857bd2272c5ceb71d6d SHA-1: a82dfdf4ae42da6a8aef69bc2197cec7e916fb83 SHA-256: ef6abbaf76802d7cab5f78db60f465383b5892a305fbc84671fa93c609898bc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9993

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://chcial.ru/uplcv?utm_term=best+anime+gif+pfp+for+discord PDF link annotation
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160981d272b680---gegutiwapesurutajexas.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2166ef13f---wapelebimifewejakivip.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/89251426383.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818cee2b1df---nanaj.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160acb99caf58a---dixatakaluv.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e83108cdaf---mukifagupinukimolebuliv.pdfIn PDF document text
    • http://atomleasing.ru/media/File/gijejuxexusisixanizo.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/nupiderelexitajepunid.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6e0a9dfe5---petesedelozosixomusukoki.pdfIn PDF document text
    • https://abeess.com/userfiles/file/63085346187.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/a4cdd9de533e88a8f0cadc1100fac7a8/rizidemepazegudum.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/60872140942.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/4hovrvc21e0hvjgqgb53cl94p9/82665697342.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607167bb569a0---vulotobodifudu.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/021614487645.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/37710699875.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160990d3486035---96187821641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/59f82cd0ac9d41f5a03d47062e72d54b/topuxegepoxinugona.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F5 6964 bytes
SHA-256: 9900ca053dcb5b14ea2778e05b71106a6b7b556bfd42871d916bad55778d2f27
font_01_sfnt_off0001036b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036B 3196 bytes
SHA-256: 588bf29b1d0961d7ed1a6a76be4f7cb957445060d05ed74d3467eaa26b4fb9da
font_02_sfnt_off00010ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE5 5492 bytes
SHA-256: 51e4f7ea39404103ed2e3005c4e2cee05de901941ae5a762db5c62ccb9845311
font_03_sfnt_off00012178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12178 2468 bytes
SHA-256: e2c4bd44b03e950acc8b739c426831c27d59e78646ffb76a2129046b4903e497
font_04_sfnt_off00012ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA6 10644 bytes
SHA-256: d462f9a5d15efcb91f2886912518e80322f2617a49ad4f02e8d3a2455b14f374
font_05_sfnt_off000150db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150DB 16100 bytes
SHA-256: 7db9e4e24de637f149342631ed32debda44d3b36e576686cf77c44419c999893

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