Malicious PDF — malware analysis report

Static analysis result for SHA-256 d095fff86e3eac15…

MALICIOUS

PDF

76.9 KB Created: 2021-06-12 13:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5e52cf900f5b65f97e2b3077db13dbe2 SHA-1: 89a0808a0961cc7c3f47e3fba3976989118d4d7e SHA-256: d095fff86e3eac15abfda6f04041a7ece70b66bdd42b59d1923465e6d6cc836d
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, and contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains. The document body, though heavily obfuscated, appears to contain references to 'carrom board game apk' and application metadata, suggesting a lure to download potentially malicious software. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cructi.ru/uplcv?utm_term=carrom+board+game+apk PDF link annotation
    • http://arniestribu.com/campannas/file/pokagome.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/73811711204.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/i14k5lhcopk6putsbrqt4kk0k6/lomofevanemidonaf.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/82245000474.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/05c59415e5386720456bcc4fb558e9ae/90244161591.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/441a1be56b748c9fb117fd116bb3fcde/gufajutixubo.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ecc2d0a67---86771574708.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/93222582490.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6577c8c51---70343691429.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/vanit.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/bafavu.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/8969766e6290957c1572e39e52739938/popepizi.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/sevapobon.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/0c02e67312f522024ae3bd48778e0ea5/bopamegakimote.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/as6mmeqlmunerved2gcath0eaj/dokodegat.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/ac8bfahv1244ag66iq6r6qu884/99430278578.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706bf457a36---namaraloxive.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a28c69a0---35837787640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF91 5176 bytes
SHA-256: 0f81770ca6a87ac77e9068b978b8eae3bd62345399671fe4d8472283b6ed275a
font_01_sfnt_off0001010d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010D 11208 bytes
SHA-256: 1827b3e88ea86f2331bd9bc254bf9633dde076f6be8dbf92d018b2f176a2d674