Malicious PDF — malware analysis report

Static analysis result for SHA-256 d850fe24a73f1c8c…

MALICIOUS

PDF

86.1 KB Created: 2021-09-10 04:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fd67feefd4123644619241fdde1ce54d SHA-1: b102382dd276639b3e4b29ee1e5b12ea2fd1a4bc SHA-256: d850fe24a73f1c8ca64b45ab3cae41b61f869630b6f577c3212952f3241539b6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating it's designed to redirect users to malicious content. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggests a phishing or malware distribution scheme. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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 http://xn--h1acbpobggs.xn--p1ai/data/files/zamopavufuzunituf.pdf In PDF document text
    • http://solemarservizi.it/userfiles/files/28138909171.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/48123366663.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/jaburovu.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210902200331552474bejkrm.pdfIn PDF document text
    • https://shinaltd.ru/images/file/50758528919.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338334b62d3---3608122791.pdfIn PDF document text
    • http://philipsphotographystudio.com/54956505355.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/xiluzowumusekozigedufuju.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/damujilu.pdfIn PDF document text
    • http://aa-nusd.jp/xekinenavejukajelaru.pdfIn PDF document text
    • http://atrsara.ir/resource/files/67101949782.pdfIn PDF document text
    • https://posh.hr/files/bonukuxokadudakaxi.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/mudogaf.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/polavipog.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/bigomurowiruxoxumimuvap.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/83206667217.pdfIn PDF document text
    • https://kawanmto.org/contents/files/gagere.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/pumosanesawomixili.pdfIn PDF document text
    • https://bloc-immo.com/images/wiput.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/povejuluw.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/90832625047.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/33336825852.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=piano+playing+app+for+androidPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3B 10392 bytes
SHA-256: 767bc60cda4e1b0c7869d9b90c3b248054849b343a72dde64dae42f3c9e853a0
font_01_sfnt_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 17624 bytes
SHA-256: 849188dce28194c7c3fa702187d556d42d4e73e10371cf1e5e348f26c575376d

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