Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba1047a672d6b43…

MALICIOUS

PDF

85.5 KB Created: 2021-07-14 05:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 05f0954361a31046e9b1c51a9f3a13e8 SHA-1: c3b7d398906e96e8a365a39effe4a6eb6f405c15 SHA-256: 2ba1047a672d6b43487922a87004954788e8ce9fd2b8751beb028197a41aa385
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Several heuristics point to the PDF acting as a link farm, with many URLs hosted on compromised CMS upload directories. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, suggests potential for further malicious actions like downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/ca693292365d71414869269f2467ef91/3020100638.pdf In PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa56645383---fabuduwudilominodoxuze.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/82242896051.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/4fc892a17870fb9fefd28a3ace522a68/vebugobetovodamap.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783bfddbc3e---modenademuzovimusesop.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/2s5p452kagg0bvjubk8hvj1927/tulidamivelegexilowafo.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5a110aba9---fakuwutadimimogujur.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/4c0c3d8d78c41f644035f1c1eadb3110/2149872801.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/26321480123.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f5806a24b---38227714219.pdfIn PDF document text
    • http://lawngo.net/fckfiles/pusimexetanirusot.pdfIn PDF document text
    • http://georgeandmaryjones.com/clients/f/ff/ff66b05efb8f16ea353d8e6908bb1429/File/zejomivud.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609165ddb9990---64399148202.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085773e458d9---52272669020.pdfIn PDF document text
    • https://componentcnc.hu/uploads/ckfinder/userfiles/files/42443650128.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/47183459545.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/8aaf2b4368cb488b5c1256de7d1af129/75556485352.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/kakapuwonokolawizuriwekat.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/be07559fc5fb8b36e3efa57775c0a537/jukefisedabejasotipis.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a317c507ece---10800856986.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7bae2e2fa---93932579842.pdfIn PDF document text
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/95415360237.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=can+you+wash+a+wool+rugPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/447da4e249be7862a1d346d2af6e0e82/12094471962.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_off0000ebff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFF 10396 bytes
SHA-256: 74782962dfe6d795c47958c475202668db337aae294605c87049778dcb1afad2
font_01_sfnt_off0001038f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 17328 bytes
SHA-256: b93a4ea22d48881f97ffd53738a10bd9dedec00f9de44bfd88bdccff756f85f5
font_02_sfnt_off00013111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13111 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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