Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea742d0015ff144…

MALICIOUS

PDF

90.9 KB Created: 2021-07-26 01:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 66c816aae8ec9cdb1381860fcf348e8c SHA-1: 90156d3b50405532c71eb9675fc4a380f4ba663a SHA-256: eea742d0015ff144d40724a056618dace558e07b16a75e170000897fc95e7db0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external resources, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm or SEO poisoning attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or further malware. The document body is heavily obfuscated and does not provide clear textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://droprint.my/home/ququ4923/public_html/userfiles/file/vufafabutageroxuvo.pdf In PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074576e8475e---zumefelinerexavaxab.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/ac582b655e541cbe7cb6f0d955f0401f/72139622880.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/462c253c14050762d59f792afd7821dc/32875997498.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f704290b0aa---buwibunizaguz.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/balov.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/5ismtdd9r5o00mkov6jk5qo3k5/53005590666.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/samanagizilor.pdfIn PDF document text
    • http://4bx.pl/public/file/womisiti.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/18e91e8f817f76b5a27999aef6300c60/2927338272.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/kiwobomovinuretimo.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608af6c2e4a39---79618504766.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/beripofaril.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/37041522666.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/86822d8061b7e6c9564a2e07034509f8/sopafo.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/15970220335.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072288289f23---kafisajugigoleredo.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/seribivabuf.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0e2bdbd1f---vegumiwozewowoluredepo.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/musoxaxisumuvoroziton.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8713e1bc2fb57c374f89af5049d3ac1/fixuwenemumilofoje.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/5051457797.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/8rr77m083nbift833jcju5hmdr/tategapi.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54d80296c5---tabovutevaga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=cause+and+effect+lesson+plan+6th+gradePDF 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_off0000fe4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11661 11104 bytes
SHA-256: 0fe9ec314a1f4ea3d0ed7bd51e9f22c0732ecfeb61ca53f0350cce4e3738ff68
font_02_sfnt_off0001300c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300C 17180 bytes
SHA-256: 88377c840e214779335732bcf5095a28dfd6235d7ecdeb2a492d0c7830cc1c84

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