Malicious PDF — malware analysis report

Static analysis result for SHA-256 6978f5569d219c9b…

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 02:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ef711515d90ee01b42ee975dd28f3735 SHA-1: 45ff52d12d8a2ec6d251e622a30ff209c43a2ee7 SHA-256: 6978f5569d219c9b6a31a163f8d5a5af4e2c58fc73fbd60ccf6fb2a132cdc76f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware or engaging in phishing activities. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=download+fortnite+on+tablet PDF link annotation
    • http://smm-mm.com/uploads/news_file/kaferos.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/vomikubanujazedo.pdfIn PDF document text
    • http://pribatu.lamilagrosaimport.com/images/files/rosirixivekujutewowot.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/wanovafodatizodigus.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/kiduvokekeju.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/benawakedezesuro.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents/files/17387363176.pdfIn PDF document text
    • http://bienbao.org/uploads/files/86096434007.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16134d7ddb5574---kiliraru.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/rugifixuweniwuja.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/1476755587.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16143ad59c446a---fivapom.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/jitidawe.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109082351274008.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/57475387347.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210914054350.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/79025027373.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/fabetanuwudilejoto.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/janamofid.pdfIn PDF document text
    • https://havilahbuilders.com/userfiles/file/33684582102.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/midesolawe.pdfIn PDF document text
    • http://nscenter.cn/upload/files/26353990639.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/15466158199.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_off0000da61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF278 10404 bytes
SHA-256: 9897947437e26fc1d7b698ec47917122dafb086e4622b945a5266c53d6454f57
font_02_sfnt_off00010a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1F 18304 bytes
SHA-256: 9129a6199f6f959d0d8f8424cfb5ef190fc55c183e0fe240bbd06b52f8d5ef1f

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