Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d911af4fc31c40…

MALICIOUS

PDF

109.1 KB Created: 2021-10-10 07:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 85cd46528d7aa643a60ca4b7919dcbae SHA-1: bab1ff9125c1132d69726eb5cfe3d3ef049513d6 SHA-256: 97d911af4fc31c40dfdf5d65c76168b0083537eb2a2827a0e7356d834aaaa565
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious payloads or redirecting users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The numerous external URIs, many hosted on suspicious domains, further support the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84926821161.pdf In PDF document text
    • https://ourguarantees.com/userfiles/file/12357450497.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/85389803786.pdfIn PDF document text
    • https://shibbirs.com/media/files/davezevofusirefajifuva.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/68464141765.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613da9390c98f---97827290372.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/mumegijalakaxulo.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/jufogesa.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/nananoxezexawapewuzexibo.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615f84c878f95---fiwepukimenatonup.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/xuvezefabuborodozawo.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/bevoral.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/2588575886.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/mebojutezigikogurusuzivug.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/2791088756.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/safamoj.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/defoj.pdfIn PDF document text
    • http://rabwork.com/media/file/73923626292.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/netubumalokubigigopab.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/wowesovomeraso.pdfIn PDF document text
    • https://safetyhanoi.baohohoanglong.com/userfiles/file/16819637586.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/xalasopewarufinivum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=consider+phlebas+pdf+downloadPDF 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_off00014055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14055 10752 bytes
SHA-256: 96a1f0cd12daf728072da7a6edb210d5c4d3e4e1353de52eae77679f3d9720c2
font_01_sfnt_off000158c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158C9 21148 bytes
SHA-256: 1630c86713f71bc6a95121ed9dac48ca7558875cb0db89b5685f9bdcebdfd289
font_02_sfnt_off00018f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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