Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c1f68148d23624…

MALICIOUS

PDF

87.3 KB Created: 2021-09-14 23:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: de9b358f964ee4a91c645e449fbfcd38 SHA-1: 5b0c69695b49b244b44f76170040bd4542487f9a SHA-256: 46c1f68148d2362443e23997393a32da2399630990fbc964601c38e8b191aa2a
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a significant number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of JavaScript actions suggests potential for further malicious activity, such as exploiting vulnerabilities or downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://www.scmsgroup.org/ckfinder/userfiles/files/25556192988.pdf In PDF document text
    • http://amsuatrust.org/survey/userfiles/files/38790729505.pdfIn PDF document text
    • https://egyediajandekotletek.hu/mvc/userfiles/file/zakusebutogab.pdfIn PDF document text
    • http://gachbinhduong.com/upload/file/veruf.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/dimekaf.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/17403957720.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/negudarumatejubopiri.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/4440c85f6ab3ef411fb1129807527637/86499129899.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/99116909291.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/28147613523.pdfIn PDF document text
    • https://diphong.com/uploads/33506576460.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/bikikasur.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/xewomijipudofisovenofisik.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210903181648094.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8e4136fb9---fosamud.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/71522831095.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c0fdaf041---33369802016.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/fomekevapanimuvumunibid.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/lifazenuwovepufusi.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/4375536847.pdfIn PDF document text
    • http://toszegisuli.hu/userfiles/file/givuke.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/fuweru.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/8103091273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=black+butler+season+2+episode+4PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 11092 bytes
SHA-256: 1f07831a0d9b2a7f65d16fb325f32fab862174ab583cf534714fd916d61dd84d
font_01_sfnt_off00010ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B9 16888 bytes
SHA-256: e0cb1c015859854043f62b183f7e5d5cb8c9d5b452b34e4f894b3d84e1655d25

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