Malicious PDF — malware analysis report

Static analysis result for SHA-256 14449bb22158c651…

MALICIOUS

PDF

80.9 KB Created: 2021-08-20 13:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ad2d8de1959fdc8aaefccd904df9ab7d SHA-1: 52086810365df62ef082ae98b110a6296ba375d5 SHA-256: 14449bb22158c651ef5c34db00ebbb496b4207a3de019bfaa9ca76ef16384c6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to multiple compromised WordPress sites, suggesting it is designed to redirect users to potentially harmful content. While no scripts were directly extracted, the presence of numerous embedded URLs and the heuristic firings strongly suggest a phishing or malware distribution vector, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/55d5411ec92286c7ef9123c4409c0682/femopofukumujev.pdf In PDF document text
    • https://beauti-full.ru/uploads/files/kirowum.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/gevosukefufakubovexano.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080c441da2ea---8145529387.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/88cd73f8a37953fc6720b8cb43b3c038/nitikimesonux.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/fae6d9844efffeb4718a2bbb9e1413ff/68634018300.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/t6u3s9se44qtfas54rjb1olsnj/98958103451.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/0ce8fd70d779421d08d41821e6d974da/riwisiderasivagabataveta.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/xumeg.pdfIn PDF document text
    • http://sam-global.info/files/file/balevano.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7fb90e87a---6851622331.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/9uiehpl0u1t7mvpgc6fei14t7f/20721400309.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/df40e9ae1b42decddc75b73176d1a96b/bezemidux.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af86ba386b7---47426761198.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/28763547964.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/64678454572.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/zosefevadudumoxunat.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb7d73bdca---lipunimarebaporadalusi.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773bc44b061---82979906351.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/sebagiwalabe.pdfIn PDF document text
    • http://modern-pro.ru/files/file/6413878425.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/h3cvj7in0gb1dlahr4m23sstkq/17825162805.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+clean+a+hotel+room+checklistPDF link annotation
    • 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_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 10664 bytes
SHA-256: e0b718eb88f62a7c016899250d45dfb83567dab7921a69431502413a2e80fdbc
font_01_sfnt_off0000f20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20E 16848 bytes
SHA-256: 852dbc80160cb9bcfe3777d0133774e1a678f1ffbe3b20ef881d1aee7760531d
font_02_sfnt_off00011dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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