Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f7981d0d64d74b…

MALICIOUS

PDF

74.5 KB Created: 2021-09-22 16:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 63eecf7b412cc563331b379e2412fb85 SHA-1: 5b7cc0970ee61c48970f8a2d833f7964ee63a4f6 SHA-256: 45f7981d0d64d74bd2cae44c179d8c684a51cae987c13d63661aa0994412ffc5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to numerous disposable domains and compromised WordPress sites, suggesting an attempt to obscure the final destination and evade detection. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or trojan distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=redmi+go+auto+back+problem+solution PDF link annotation
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jilotol.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/zaxugatevew.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/bawilegewub.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6e362119a---25684688213.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/nitezuwezurulejoferib.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/getekukof.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/razevixibiwepe.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1f7f13071---wugadimup.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/20985654812.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///xupesosaxevu.pdfIn PDF document text
    • http://satcomlink.com/userData/board/file/wimovurosedapivapadikuv.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/dugurexoxesupiv.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1630531472.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/niwivape.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/bokubiko.pdfIn PDF document text
    • https://ladachess.ru/userfiles/file/gavekiwuriravaxipofamodi.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c1885c25f---54962582127.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/bowifudozidodusumefikopu.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614acd3315c5a---gusajilut.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/5660237091.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/95657324792.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/tanasaxi.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_off0000bee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE2 11236 bytes
SHA-256: a11cd45bf41b3a0206a58405101530d0a5f592707a9c765a360e115b9ba531b1
font_01_sfnt_off0000d8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DF 17272 bytes
SHA-256: c45486903f2c5673a5661083c0ed3d1a9e4b178c21c21abb5024b7d0a46c0acc

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