Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6cc594000963289…

MALICIOUS

PDF

82.1 KB Created: 2021-09-14 17:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e2c9c4c0cb830ba950d79b063ddd41e9 SHA-1: 69c8d67f102ee9b064fce205e877ca7e08129309 SHA-256: f6cc5940009632893082e81eabdf5b810b6ef170a05058169bdd7131db9f486f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://garglob.ru/uplcv?utm_term=crop+multi+page+pdf PDF link annotation
    • https://anukulagrotech.com/userfiles/file/retaw.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/37t1t326uq8va5b2b432ik2s3r/rezuxavanubumubobimep.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20219133159212.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/80937413892.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613a93a615668---1624798218.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/63313056942.pdfIn PDF document text
    • https://cmf8.ir/data/file/80046692716.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/bivajigoredas.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/zimazeporufopuluna.pdfIn PDF document text
    • https://cakkue.com/contents/files/pevugegixosetun.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/mosisas.pdfIn PDF document text
    • https://aqualibramontois.be/fckdownload/file/42117838068.pdfIn PDF document text
    • http://poiskvod.ru/images/file/petebirubupuwomelapadaja.pdfIn PDF document text
    • https://blugarden.eu/file/36708545857.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/24318263572.pdfIn PDF document text
    • http://quangcaosmsgiare.com/media/ftp/file/fivorepofirufenokaw.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/xuwogonize.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/mesemij.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613012cd46973---82026089443.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/rajixi.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44742230405.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/gukijuta.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/85557215702.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/dipamazojatojiniponowa.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/nasit.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_off0000d7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CF 10700 bytes
SHA-256: 63e7aac62f91c0d59c10d1824858bbab918789f7d661d14e13707b00ec7f5404
font_01_sfnt_off0000f022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF022 19132 bytes
SHA-256: 757dce5ba5d062d1347ed432cff01469d90c1b930b40f3011027c89efdb7d7cf
font_02_sfnt_off000122da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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