Malicious PDF — malware analysis report

Static analysis result for SHA-256 8723042288dd808e…

MALICIOUS

PDF

81.8 KB Created: 2021-09-04 21:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fafdc6982d716f74f85b408f2162a19a SHA-1: bbb8e5b3995625f7551475c1e14474e9f745ae1f SHA-256: 8723042288dd808eab9981dcf5574877461c22f7348f2fe2ba21663a004dcdcf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links indicate an attempt to lure users to phishing sites or download further malware.

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://garglob.ru/uplcv?utm_term=lecon+solfege+piano+pdf PDF link annotation
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/1f9d01e1abda0def9890dc587166fa76/xijoferokipekopof.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/sfcmfcq8quemstor0ue6g2n6vn/menijosugidaredulud.pdfIn PDF document text
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/55995829245.pdfIn PDF document text
    • https://fallsplat.se/file/69386865299.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/83043475205.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/43cd1dca46d74dbfb7b5ff539983eaba/juliruvinukanosuzajo.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/togilikikosabozilek.pdfIn PDF document text
    • https://osakadentalcare.com/contents//files/lipemon.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/94031743194.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b24fb54d8ee---23223924679.pdfIn PDF document text
    • http://lovesenergy.com/file/lizona.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/78860958284.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/4976c9288e527ab70f14799a216c1c0d/nebit.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/gapimadadumovuzekir.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/fad1fff7694a91ec03ecf7739224f0fb/xugamefozaninudexopas.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/datut.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/fezidugotekifotokaxedo.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/582f0acf5d4eb8349d08a9e3c5cf9703/dituxidawijogepujexo.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1653497553---55511175143.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109c36fb5265---fewuwe.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d00dd46bec---nopusemidevapaletaza.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a46afafa9e---56832935717.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161326b9807e61---28775864925.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_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 18068 bytes
SHA-256: 68d6e5d88eac780268a3f0f41e97d447869c42b1cd3dd07c4ca3f0eb7b00fdb2
font_01_sfnt_off00010941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10941 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12158 10552 bytes
SHA-256: e0d7b54b2d8350eb7d7e940c1d068a23588df2d33759205e63cbad2f1d0a183c

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