Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5be424308a6fd8d…

MALICIOUS

PDF

74.3 KB Created: 2021-09-08 09:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7d83bc62e9fe59f75efbe4c728c89bc4 SHA-1: ac44bd35ad94ee29f7ed46f875c126a8db0e7769 SHA-256: d5be424308a6fd8d17fbf4dc313ba27563aa3952d9396413bed178f0de012ef0
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites hosting PDF files. The ML classifier strongly indicates maliciousness. The embedded JavaScript likely facilitates the redirection to these compromised sites, which are part of a link farm designed to manipulate search engine results or host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 6

  • 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.
  • 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 https://archism.ru/uplcv?utm_term=pbis+matrix+pdf PDF link annotation
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b31047df2e---fuwoxoluvebakijaneb.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd724a8e02---41155292749.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160e77c9965f09---82944447485.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/jefavupibebas.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/rokudubekutewanevapefoda.pdfIn PDF document text
    • http://anupbolivia.com/images/files/rajanovatasid.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a79754d50cc---24241471965.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/21481636977.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/72509163982.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077e12e1aef2---bolewuselironi.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/fabefijidafewagik.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/nosugifenuvanebenan.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917e3b6610f---wexef.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edfc526f2a9---nufetetirufomejowi.pdfIn PDF document text
    • http://capri.lt/userfiles/files/49084746050.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608286c0d644a---41774401171.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/13510385721.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/jepuzojepobogepo.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c0341b93---tumuturofifisizipebikapil.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/30297208370.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f6e2b8dad---nafawurogidexogelu.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/xujigupobigi.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc34fcd3e7---67008051345.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/49858144190.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/28721728515.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/7347848235.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/narujinozabetedeladu.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_off0000c181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC181 15964 bytes
SHA-256: feb85e54db8b44841cf1344524e2a2dd836f75810889206d653344f44306e637
font_01_sfnt_off0000ea2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2F 10500 bytes
SHA-256: 7620bfd91d5a7a36cf62b84f3890a4463e9324eba04e0871e715200bee2ba2f4
font_02_sfnt_off000101e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.