Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed871393bdc4177…

MALICIOUS

PDF

90.5 KB Created: 2021-06-14 03:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bc1cec151eb1f97e037301d7edd86c1f SHA-1: 74f6f58fb3846f8a9d422ef6e8557bc68ef4fa77 SHA-256: 0ed871393bdc4177bf1b059e7a45f9ecff061baec873b2b6f4d5ad72b5ca8545
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cructi.ru/uplcv?utm_term=jurassic+park+3+gba PDF link annotation
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f09069eca2---texureme.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/2f9555b526b2950c3c3103e493bde804/77290754704.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf05144613---91187862103.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c783f5d512---99997259833.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160919ac4d5e7e---9737690483.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/7fc2999932fb069618204acabf20f6a1/18763131538.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3285873db---wixulasevagi.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/55107302623.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/hohegffg7mo2pn2288ulosag77/33567225939.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210605100313.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d9fecd16c---38529990135.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/jedubo.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/q1aul2ett2kbbo2si4ovddsd0q/37263564671.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/29d0ed83c4f78eced25395eed8247b6a/31859148967.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/32759301074.pdfIn PDF document text
    • http://jamessham.com/admin/usercontent/file/95012359171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DE 5424 bytes
SHA-256: 2736276c302b7f003fcca610f8c64a095407af5c5309f9d0b8f97f926444a6d6
font_01_sfnt_off00013860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13860 10892 bytes
SHA-256: 05cd4e2c83212d0a3bb584cd71a556707361d4a95a56746496dbc8cd9bb38d96