Malicious PDF — malware analysis report

Static analysis result for SHA-256 93030979dd5e144e…

MALICIOUS

PDF

90.5 KB Created: 2021-09-02 14:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 432ea3cf410e550becee73bae009078d SHA-1: 6a218bc422dc74990ea1169fb2f4bab0bb11bb96 SHA-256: 93030979dd5e144e8c18acad5847df7c57326c34a6db009e77e0e37a4da6ac1c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://wastran.ru/uplcv?utm_term=property+rights+thesis+pdf PDF link annotation
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ssidlfu8jlcnvosg9kamfn9mtj/lofavexofusoxewesijifitat.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdf0b3b599---funolojeninubimesosu.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a95213bfb2---50951530615.pdfIn PDF document text
    • http://rghsalumni.com/clients/82979/File/vilekebizuwonokodopewisix.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202108141724175987.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/renibadadozisufi.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764d1b1084c---89000200970.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c19aab85b---24411263817.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/dobanifafutebebisupizewed.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4c46b7321---28597764341.pdfIn PDF document text
    • https://anfauglir.com/images/file/zusosexudiluwuf.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/aancc6qiij8dlglsqrk4rmq2ji/todiremelorumusegumegenis.pdfIn PDF document text
    • https://teyadegitimvideo.com/calisma2/files/uploads/39582928549.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/vefefogimu.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b73ddb3ccd---25830998616.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/joeu0siapuobdq821m5ben12b4/42318512410.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/namip.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/nazujujatizuganen.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16112cc6a1e6d4---fozuvewago.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d3e4e1a5f---2107160887.pdfIn PDF document text
    • http://donationwebsites.com/clients/6/68/68901b9e08e997a22fc64c74502b39ca/File/96258352871.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/2401fb1336a7449fd3db4c0eab9f8e41/84623340869.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_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 18732 bytes
SHA-256: f1a71d7cd5ca6460c01999aa3045d4bf6ccc7c9450c917f412536d2e655e4e21
font_01_sfnt_off00012c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C42 10580 bytes
SHA-256: 95b37ad8f3a4509f6d41b64385f11b5e923147b6d305d2a96cf08372e3a95333
font_02_sfnt_off00014454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14454 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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