Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b30969bd369279…

MALICIOUS

PDF

77.0 KB Created: 2021-09-03 20:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 52f6b2a5d38083f013d156c3dc8bab1d SHA-1: dda3b60fde3ca460997cca6e1156ae8629961907 SHA-256: 30b30969bd3692792dfe935361439a547a6e5f240dbb24a8042bf99197d18ad3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs, many of which point to potentially compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 http://northjerseyseniormenssoftballleague.com/clients/2/22/22e10641a135963e7b476298ec508c3c/File/52833225880.pdf In PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/foweguj.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e32d66bb0---10668520554.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/sozevav.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/89100222767.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607214f76d164---jubipewaka.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/h6pote1qtrc4a2avd3rc7phbp0/98972022453.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/u1mqq15q8bnt7a5fd8t2eo3m08/xexureradane.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/miwagoxutozo.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/ferodomipejuwoninoragir.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/4be0df0aa9d63db343a920ca123ee9aa/duxawaxetefeniba.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/61175454110.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/7c400514e1cc383f3e4fe3c9180a8660/gajiranukebegujinezulov.pdfIn PDF document text
    • https://cancelaria.pl/galeria/file/mikibulipuxukilujak.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/10954671947.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/disagobuwav.pdfIn PDF document text
    • http://qianxi.cn/filespath/files/20210828224615.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/dumekapulinurezutafajox.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/0799c358cbf96bf3fafd18ca59b785eb/biburomegu.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102d1588dabb---fejobi.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/59627531472.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/lodatawelirazalikanelot.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ab399ee0d---javobatenarutanafigid.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/70db17b0fc013b9ef08c6e410bc2cc46/sopelifuberaminopekerujo.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/44095159225.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=tiroiditis+de+hashimoto+pdfPDF 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_off0000cb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB19 16876 bytes
SHA-256: c78d7910a45c17415eea87df8c702069acc882855d5ef0edc3f10e82405e0e45
font_01_sfnt_off0000f659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF659 10576 bytes
SHA-256: cd30c3b06fc1f27dc070ce718c90b889c4b7b8b8f31989b35a90a48a654e9b74
font_02_sfnt_off00010e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1