Malicious PDF — malware analysis report

Static analysis result for SHA-256 92258eaeb1f16057…

MALICIOUS

PDF

103.8 KB Created: 2021-08-01 19:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 02c24e6ef256f925accf2d0573af3058 SHA-1: 47e899535a949edd9481f6e4210a632c967133d7 SHA-256: 92258eaeb1f16057c06a82a9d233caf9b7ca0a14308d1f10d916d8c1d0a8e139
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous links, many pointing to disposable hosting or compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a visual download button further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9532

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://cructi.ru/uplcv?utm_term=bahubali+2+full+hd+1080p+hindi+movies+free+download+filmywap PDF link annotation
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/takekaxeseluvigedaro.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609233d10ae72---468866899.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/75204710953.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/78055105389.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/71375313263.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/gujemo.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/015412d6247cb9519aa40ea72ca4d86a/vawevutipudutumopibesevu.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/99595640549.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/tijoxudewugapame.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/9253c715fb80bac1d5498caf9684b1c7/sokukobenugugomunovim.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c476d5562---62734052171.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160735c891cc5b---51155538535.pdfIn PDF document text
    • http://inspirationforexcellence.com/clients/66491/File/6483867235.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/33813430246.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/53703671542.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/28258ff779f1d12449a6bfb27fd34ca8/ganabi.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/202f3085320cf2ec299c3e5b11cbf518/59601668047.pdfIn PDF document text
    • https://babamore.com/upload/ckfinder_temp/files/20210706093848.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/u7pjteagtse78u0uac0vei750l/63262521448.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac442367803---97243831829.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f40e27e87ab---30720136178.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16074433145507---23054156495.pdfIn PDF document text
    • https://posh.hr/files/5767069211.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/9994279442.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/fapagikafapobiwaruwolivox.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b48e5cb4f7f---74108508073.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11424 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3B 11724 bytes
SHA-256: b1991777d6c2a503c71a8be72a5dceb6295225a9c52d908d919ff361202df1a7
font_02_sfnt_off000147e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147E7 16148 bytes
SHA-256: fa994f272e1b37b9ea89b962443a0b3eeabdd91e2b92f52f55917d7e59761bbf
font_03_sfnt_off00015d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D6D 18112 bytes
SHA-256: a12d4fad817478499ca3b4fd5ceab1cc695ef68340e5377519ee992b37057b2d