Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f0ed03f4bf70c6…

MALICIOUS

PDF

73.1 KB Created: 2021-09-25 00:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6a3cd0fb1234c52523c2cc4e6b72abc5 SHA-1: c21da524ffae5f8d57c5fef154170a206434542c SHA-256: 97f0ed03f4bf70c600f61107db9f5bc18718c16fce6e6c9c2f89dba12a687a5c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and the nature of the URLs strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://queure.ru/uplcv?utm_term=can+you+transfer+android+to+iphone+after+setup PDF link annotation
    • https://sesconbs.org.br/ckfinder/userfiles/files/mizakomen.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/90713854998.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/zenodosapek.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/e808b186d6fc52a184a68845382af92c/92845896926.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c15f32ed70---lufeboxevepubiwirux.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109101809095184.pdfIn PDF document text
    • https://panoramabyty.cz/content/70392160345.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/27709936300.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/16203084951.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/dufazotedovupu.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/sesiwezujesapuguwefuve.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/17345247381.pdfIn PDF document text
    • https://fivetc.net/uploads/files/togoluki.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/semafoxiniwunabupa.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/62589358490.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/68549001023.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/27436772368.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/35312660009.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/98571511305.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/79767578441.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/zokizezimawuwalekovipe.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/20523756729.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/94112320407.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210904_DB12936F261F050B.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/21567099344.pdfIn PDF document text
    • http://machulski.com/public/file/dowaserimerer.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_off0000b6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB5 18308 bytes
SHA-256: 06211b29fa535b58dcf42a0ef274b2f172e63ba6196cdde1b0726e7d5fff2579
font_02_sfnt_off0000fdc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC8 10792 bytes
SHA-256: 645ac212cde5bc29c981187326cc6579a66c5e49ed6756707d197a014e19b333