Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e83755fbae58ee1…

MALICIOUS

PDF

83.3 KB Created: 2021-07-03 11:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 04576691dc8a1deae231059224013113 SHA-1: 89296bf2c1cf80f8839ca80942eb440959ace4c0 SHA-256: 7e83755fbae58ee1f8a62ade455500f8401b096ab7f590f964cf9fcd3b7f3cbc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that exhibits characteristics of a phishing lure, as indicated by the 'SE_INVOICE_LURE' heuristic and the presence of numerous external links. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded links likely lead to malicious sites designed to steal information or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://garglob.ru/uplcv?utm_term=time+of+essence+clause+real+estate PDF link annotation
    • http://www.advokat.com/app/webroot/img/fck/file/pogamamawiwibe.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac9e7111d4---36132243578.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/ua6cobv78rv0mi70ml4sb3bj7m/radevijakininukexev.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/71636977687.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/mirijiselirokomevefi.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16076038394e5d---mitepidapovupatejevoxana.pdfIn PDF document text
    • https://renault-service.com/userfiles/fonebabuvupe.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/1a3d8eef1fcb668dee07b5d6f4afdc50/weputujuxoreritogesew.pdfIn PDF document text
    • http://philcoastal.net/ckfinder/userfiles/files/tajesukukenitegonikujudo.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b79f5776edd334b6ed42f20637a8ee2f/visopinuxevemi.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/ncs3hafsp0hhs8su0vj34qv7s7/35922436491.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/30495892242.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/59235899413.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/tivadabosewapilim.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/tunixaxitiw.pdfIn PDF document text
    • http://giaoducvietnamtv.com/images/ckeditor/files/vazugepux.pdfIn PDF document text
    • https://patc.fr/imagesfile/wixowolimawajimaz.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cfeaaf71f0e---gumimuburulonupe.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e756b1363---63991736065.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/mapurivewoviwivevotaferox.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/33201087450.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_off0000e5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DC 10560 bytes
SHA-256: 1521a787f6a13ce3a76b46a5b76fc6aff54d87149d9a8d951f909cffce2a3c1f
font_01_sfnt_off0000fdfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001160f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160F 16260 bytes
SHA-256: af86b843f0c50dacfa10bd92d5b0382581b1cd2eac477186330e39637f2124b1

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