Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f99de4d94c5382…

MALICIOUS

PDF

76.6 KB Created: 2021-09-15 22:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 39dddd6133be372405c46ec9be5ed352 SHA-1: a78dcb433acc8f4a0f5c300b548be536bb82b8b4 SHA-256: d0f99de4d94c5382ab5794f229fecf3fcc92f0f0ccc7d36af401596c19711079
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and numerous external URIs, some pointing directly to IP addresses, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guwumafawasutolako.pdf In PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/10962634184.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/60761743113.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/fosadevurivorik.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/84295248728.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/af208cff8844f1f518225c18f75eecc8/xurazosufetatubaposemev.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/nemasamujata.pdfPDF link annotation
    • http://regalmotors-jp.com/js/upload/files/97253897269.pdfIn PDF document text
    • https://oasis-travel.ro/files/savenigidapevi.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/93271993511.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/92527779784.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/fikuvesegikolisunowe.pdfIn PDF document text
    • https://polandpools.com/contents/files/42625790892.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/jopipupulati.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-12-21-57-07-44.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/wajiguler.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161389559beb7e---bafaworawewotolurun.pdfIn PDF document text
    • http://sakulchaiplace.com/Uploads/file/sojefutubunosupena.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/fodasepovegabilesoxazufed.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/95437720067.pdfIn PDF document text
    • http://ifap.it/images/file/relidoxuzapobatojutifo.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/18519082907.pdfIn PDF document text
    • http://sbcnepal.com/images/file/97812489961.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/lapuxav.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210910045645_udgo8z.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=line+graph+usesPDF 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_off0000c99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99F 10324 bytes
SHA-256: 112a82d24041db084763a74d0bd743acd484e7b9ec702737ecf9869cd216cac9
font_01_sfnt_off0000e0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D4 16904 bytes
SHA-256: fdb6a11f390b76b57e9afcd9ef55d9f60e51ba3c8db085ffe3391487314d780d