Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed1b71fc660c1c5…

MALICIOUS

PDF

75.6 KB Created: 2021-06-13 23:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 293ab927c40e6fd29bb5e718bfc8f090 SHA-1: e539ad6d4a322c46f062ccb09dd8371d7a9cfc50 SHA-256: 0ed1b71fc660c1c58df159062ded363b3383d80ef979f9ee18f821413b70cdc3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further indicates a lure to download potentially harmful files. The embedded URLs and link farm structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://synerhu.ru/uplcv?utm_term=raees+movie+full+hd+download+2016 PDF link annotation
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/8bdbf315764e72f4b65ecd914f388418/23159673503.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/5aehd6dle13v530t5p78evvfrb/52642982185.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec80cd636c---99036581931.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/lizebibugodoparinosalede.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/vakijolosinobapabur.pdfIn PDF document text
    • http://wamer.org/userfiles/file/peduzaliduvuja.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/gdubf3j4uj1sc567kuo9prgu33/39229645517.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/77484447591.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/296b73f8ffb0722860dc7a23afabbe1b/galet.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/rubafor.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d871701e18---91855682999.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/30579454730.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609aea0d18575---jikiloxateteniru.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/b7e414039175bfbc769f8b9e8c9e2160/jiketujumalesonutoz.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/rizifurajodareloriwovi.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/wisixurexizegafu.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_off0000ea63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA63 5688 bytes
SHA-256: 0f9ea5c50af70144e62418f92753230759be7f743da052a40ce9f5a89d4c569e
font_01_sfnt_off0000fdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 10492 bytes
SHA-256: 2f3380dbfea090661d10e8a180c02e6840bdad9b1714347da8c538f5bcacbc4b