Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebec38e17dd2066f…

MALICIOUS

PDF

106.9 KB Created: 2021-09-04 20:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0969d496e5a966b610bd18b812796c2b SHA-1: 1227fbcc726421960d05793b427d3b691a5fd5a2 SHA-256: ebec38e17dd2066f191a02dd6f4a4c1bce6283d8892d319051ccc202a9f7448c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing or trojan delivery mechanism. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://wastran.ru/uplcv?utm_term=les+connecteurs+logiques+tableau+pdf PDF link annotation
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afbf241adb4---38278062518.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/9067569001.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/gogekipaj.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/vexelagaporagig.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a89c9ac0cbc---12235469531.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/48306378618.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/30377709296.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/v4kg28oppa8n78e6h60r360mil/44919425527.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/870ecfb3bbeec538c1977f3fdbf76306/5817806175.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/10744212382.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/vavafovuteru.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/0aov5j4rkqjvrnohsfmtsfv6uu/mubukubafubamasaga.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/48376530841.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/kifawukuvanegefe.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jusevodubefawoluxamew.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/xemufiluvezovij.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a387d647daa---fumopusazakowa.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f3162b4b2---29219230446.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/sudawumego.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/kamixufuvusifivu.pdfIn PDF document text
    • http://moscowballet.ru/userfiles/file/mebavipeda.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/loxaz.pdfIn PDF document text
    • https://ever-progress.com/upload/files/nitepizigisu.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_off000134e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E5 11140 bytes
SHA-256: cfa14eee213bac703b9062fc98f59eef90ebebf1723f957d5d6a0ceb7b30f249
font_01_sfnt_off00014e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E46 21792 bytes
SHA-256: ae9f0f9a69ea04a456df93649c26fefb34c03936938f4398903be0d15c9b4255
font_02_sfnt_off00018556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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