Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea71ad19639ccbc…

MALICIOUS

PDF

77.9 KB Created: 2021-09-03 10:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d05a03544f0996d5c498d8cac5a879b SHA-1: bd41084953667dd75aa2be34333049997edde021 SHA-256: 1ea71ad19639ccbc51dedcb751d16292bb9840a11084315a5171a3b1312b9efa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=ekstraksi+lidah+buaya+pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f1a648638---94799284763.pdf
    • http://labonguyenhoang.com/img-chamthi/files/92444302795.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/n4ouphprvbud10pi5fr2aonl4g/33232112229.pdf
    • https://media-get.com/userfiles/files/nopelenokeboromebami.pdf
    • https://keongracun.org/contents//files/73214245568.pdf
    • http://brooklynsmokeshops.com/admin/images/file/82115257368.pdf
    • https://www.indoorclub-informa.com/boletines/img/file/buseroniduzirirewobosor.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b59b80c7cf1---jutowud.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091f671ade13---28658082532.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5ba8c76af---39900971272.pdf
    • http://mmckno2010.zkosuchdol.info/files/74098550181.pdf
    • http://bitite.lv/media/txt/122/file/22810047367.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e9ae91171---57680498887.pdf
    • http://jinistudy.com/_UploadFile/Images/file/jipabaked.pdf
    • https://rinducm1.com/contents//files/40575411908.pdf
    • http://pospatrans.cz/UserFiles/File/gulopunofi.pdf
    • https://perfecthospital.net/FCKeditor/file/nedasulakobotejif.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9d5c64bbf19a2cbd832adf091b13b4e8/71054834215.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f5f5ca654---bifiredafitifuvelewojimi.pdf
    • https://ajitcoatings.com/uploads/pabotarojezugagobatuxenow.pdf
    • https://brakos.it/file/wusoxararatarobu.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d85532e92---fumovozolatafisudej.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf62.bin
cce3e12909e38fd1400ee2d8ba6cffd1d9488087630ec5ef74efe97c2c9c39fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF62 10668 bytes
font_01_sfnt_off0000e7b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B2 16792 bytes
font_02_sfnt_off0000ffc4.bin
c041bb2f6f4a0d440c95283ab4bea75c936f834e6b1285b9bfe1cf5a7c26e762
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 16376 bytes