Malicious PDF — malware analysis report

Static analysis result for SHA-256 2edcbff9ae627a0b…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 02:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3dd3f70d7c86a918853852821640ba24 SHA-1: 034cc6ed1158586f53c9098e54cbb8e7656791f1 SHA-256: 2edcbff9ae627a0b6fd2716863a7e59f241722c2e72cc5c482f8580e17d5bb20
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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=zelda+breath+of+the+wild+xenoblade+chronicles+2 PDF link annotation
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ab234d01e87cc6199fcffc6f57abdcd4/32904036261.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/64569273836.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e341f198104b2da7057eff59d11ab0d2/87649926336.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/tsagvmvf8qagl8mpjffouqb59j/75290724805.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/givolox.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/disesuxo.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0606315001630836926.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141e8ee8d9ae---52311227686.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/lelefegejirebarowu.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/zoxasaxijalazagif.pdfIn PDF document text
    • http://prestopc.it/upload/file/6660520987.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132905cd32f0---65535518526.pdfIn PDF document text
    • https://onecre.com/images/content/files/ropuwegozebazivekazawuril.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e568d4332---tomete.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161343d599b593---niwuwajaxepunelonini.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/67667246767.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/89586748692.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/bizedov.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/dawuwuvivo.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/4a1eff90872c474135fadac3d4aa9936/guwuvu.pdfIn PDF document text
    • http://gazomotor.com/allinone/file/tuligevo.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/vizawilagotigewikeru.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/larigirukaronatux.pdfIn PDF document text
    • https://fivetc.net/uploads/files/matexidumabukefikezavo.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/regajaride.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/pevoni.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9b471f398---binomagulasag.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_off0000dd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6A 17696 bytes
SHA-256: 1d7bf3ccc77d30750a4cdcf05610b925313979976673216ecbd8890a5605bf29
font_01_sfnt_off00010b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B14 10984 bytes
SHA-256: d57cd26c8ca2441848b2904472be8645e7a2a0b5f9c3c08c50c141d4ba3bb367
font_02_sfnt_off000124a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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