Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14a0aad65fb1842…

MALICIOUS

PDF

77.9 KB Created: 2021-08-13 08:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 48aa128ca97768242e923b351fa0b34b SHA-1: f2785e843f4a794e529c70c4c70da575efb0c342 SHA-256: e14a0aad65fb1842379cd5d174499e68a3ad4286fd0b293f54231e94c94dae51
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and link farms pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The primary attack pattern involves directing users to these external sites, likely for phishing or to serve further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://archism.ru/uplcv?utm_term=cuanto+es+7+5+pies+en+metros PDF link annotation
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/b8027d8a770b993d55e7caf7e968fa11/56641132706.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c948c1431da---giwovixasujutafupu.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/xuloloxuzeleton.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a4c8f265b---viguroxig.pdfIn PDF document text
    • http://metallpress.info/files/ruduzo.pdfIn PDF document text
    • https://mszukam.pl/dat//file/rasaneso.pdfIn PDF document text
    • http://art-ball.net/files/file/zukogevige.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/2hblvcuuln10se9f6f3jshbvr3/xanivos.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/gagujobivaletipeduzawu.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/6be3f2890294804bc9e0832a0277267d/mozigosikasefemi.pdfIn PDF document text
    • http://kasargod.net/uploads/file/vomasig.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/97164035694.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/ripatenalez.pdfIn PDF document text
    • http://podushka.by/files/files/wuzesinasujewowow.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9e7ea4bc---xunufedujixoj.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/58500450741.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/sosolodubezimusosiguz.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/3c64f0d837edb485ac8fdbdab8e27480/70437956190.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/tudisexa.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/51745151870.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074533809e93---tizejixifemigusajanebeban.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/27344792198.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a101633909bec635074d4fad056df0bd/kelijopijitupi.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_off0000c8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EF 10684 bytes
SHA-256: 4e72e706baac7d253e8ab08e9b7d7c8f5f7efc5c7fd0f94f2baef0e84b38c86e
font_02_sfnt_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 18724 bytes
SHA-256: 052a52a4909543d59229536959e8e9489eba5258c78c5da3fbbc8e9dac231c71

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