Malicious PDF — malware analysis report

Static analysis result for SHA-256 45fad58f55797731…

MALICIOUS

PDF

89.1 KB Created: 2021-10-15 12:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 69adee3873bf94ea0838a192f4f8e448 SHA-1: e70fc96775cce7ae08fe21f4fc50e9bc37e0034a SHA-256: 45fad58f557977315d79014633ff4814bb1d530b285abc0b5f9eb3312e9127e0
156 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 heuristics reveal it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to lead users to potentially harmful content, possibly phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://oniceh.ru/uplcv?utm_term=bedwars+map+hypixel+download PDF link annotation
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/0h8n2rh3jmsnlmgrj9223sat7e/butabanikenu.pdfIn PDF document text
    • http://malifer.hu/upload/file/85427758914.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/34062605815.pdfIn PDF document text
    • http://congluc.com/upload/files/29821324387.pdfIn PDF document text
    • http://www.reeder.ee/files/filemanager/litapudo.pdfIn PDF document text
    • http://elpijisystem.com/file/jipisifatiwepubefo.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/12856443154.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/woponakelisenasago.pdfIn PDF document text
    • http://muszempilla.com/files/file/9571481992.pdfIn PDF document text
    • http://alhambra.kopanramen.com/uploads/files/kogafibabupopavopuv.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161422649316b2---tavasojopogonebit.pdfIn PDF document text
    • https://ises.smithpressautomation.com/phpsites/vertical_living/uploads/file/7878012303.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/ziwikurutuwu.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16169322e32e64---tomusixinemekebo.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/minenixaxe.pdfIn PDF document text
    • http://jarosi.hu/files/file/jufetazibininasut.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614dbdf5d4e16---97070057896.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/fuxigawaranixorakezisiwe.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/jepomobiraj.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/35073306853.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/dimukutosunaluvagew.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/43152375914.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16164b1974d297---13099565913.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/17410430485.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/13571873615.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_off0000f73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73A 17640 bytes
SHA-256: 2e068f1d60e8e26713a0787159cba74273608ebc369de11ab1e48e080d13123d
font_01_sfnt_off0001255d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D74 10916 bytes
SHA-256: 0c1a2c6c12fe591106e60f2c1fe11e509d1c1f427e4e3fd2a018501b9145fcb9

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