Malicious PDF — malware analysis report

Static analysis result for SHA-256 027cfc220dd3f6c7…

MALICIOUS

PDF

100.7 KB Created: 2021-09-06 04:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 2ede76bf634e4faa296ad0431c1c5309 SHA-1: bdbece4cea12840d4fa192ece1a5f96e9222d9a5 SHA-256: 027cfc220dd3f6c766fe117272e67d470e5434573f8524d20002a674bacdf17f
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a828f832cb3---49737855252.pdf In PDF document text
    • http://afgventuregroup.com/cfiles/file/89321653721.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/57016337127.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160795d308ea01---14342426125.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/81912251466.pdfIn PDF document text
    • http://spencerrandlefamily.com/clients/864257/File/wilidalabirejodobituwusix.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608803c592160---59689005006.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e6f8e6baf9---97876104498.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/jodawapasusedifazu.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4d6633bd083998ceeeffec0c6852ec8b/xivoxo.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/8858e6632e034e0dc41e9e8dc5d7e688/22986667885.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210825101246.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d344d3a33---bidizon.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610dc3859ca7a---41347035985.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/31022583114.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/84860654262.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/mizurefabugebekagedoxek.pdfIn PDF document text
    • https://sabresources.com/FCKuploads/file/jufimuwemelenujeba.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/lasodamibamufosunato.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/87597196881.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16121559a71056---bibojexidal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=labview+generate+pdf+reportPDF 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_off00012005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12005 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13817 20096 bytes
SHA-256: 7126988ddbfd7b0a7a9e3b823ba66036fe102b4bd3aa97d341580cda4ccbbafe
font_02_sfnt_off00016d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D02 10708 bytes
SHA-256: b49b07354861176cc2b8381b8acd190d4183a27a5157388b71a43200241389ad

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