Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85ba925594ed83a…

MALICIOUS

PDF

69.6 KB Created: 2021-09-29 02:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e594aa042ab4e37f389747637f050a83 SHA-1: 73c6da3982f3a1d4cf6947a6dac1644370a1c439 SHA-256: e85ba925594ed83aa9ee11a0cb007452e2a75b49397580a5d5e73d85c00a7dc1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://nomaquito-travel.com/editor-images/batulinisonibepun.pdf In PDF document text
    • http://afghansolar.com/userfiles/file/tajenarolevuj.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/rakomomurademoluxokise.pdfIn PDF document text
    • http://www.reeder.ee/files/filemanager/56406862578.pdfIn PDF document text
    • http://aurastaffing.es/upload/file/gatevuz.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/cfbff0ac1469d54819bcde504dcbad9d.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/54438979429.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/xegotofelotilowijowelozaf.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/fusabupasatetugijozida.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/putexepuxeso.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/4974047206.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/solegozunewobazixagotimow.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130e13d2e6d8---34330864715.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/7674976443.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/sujano.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/80534032963.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/49439601789.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/wikake.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/72756857950.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/lawuxasogivakojoka.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/96700970824.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/39811958527.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/xuzazijeposuwowefud.pdfIn PDF document text
    • http://www.lalorraineperdue.com/documents/lukoz.pdfIn PDF document text
    • https://tonitomov.com/picture/file/migiwunabewopalevim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=solomon+gold+share+pricePDF 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_off0000b088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB088 10936 bytes
SHA-256: b4b5427894fc9deb4550295cc992295d39459f669dfdf414bbac80828de73976
font_01_sfnt_off0000c958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC958 15536 bytes
SHA-256: 1735095bb465614454e0983bf96e2f26f6bad506723079f5814af10eec66433f
font_02_sfnt_off0000f0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1