Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee06ca6e63fc7c4…

MALICIOUS

PDF

94.0 KB Created: 2021-09-02 12:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ecacc9798df287868675ad23e867d77a SHA-1: eae1e7dfd28613dd52597344a518129a75efefb7 SHA-256: 4ee06ca6e63fc7c47fe2a59c678def2ba5bbbee6d4cf1b5b0b6bd56a8776950d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. It also features a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malware or phish for credentials. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/jjubc3i7r96k4jfstlpsa3o2e3/vodusoxomune.pdf In PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd23d41e6e---61837614829.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160fe6ba7ba5c0---xaxagezedubara.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ljvnadrni6lvdk882mcfhoek74/60392078493.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/gedugokoranej.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0vjl4pba9gd3uq0v7dtucqvks0/xivabitorix.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a15c7f61e66---65242873625.pdfIn PDF document text
    • https://ecosolar-energy.com/piceditor/file/54708635779.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce99e18c3b---11528312555.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/18722312198.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/1u6i71k4fu0nprp8n4rltas4pn/4884295570.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/49f6f8fc416c79607a329be3a70a79c9/tozinefudetugesarorexuko.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/bejofedefosasedusilo.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/68214421429.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/93416079280.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/2895585874.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/rexisefetagugexoluve.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/wediluviseva.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/93424324550.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/29a2e19fae9a6c2cc01f3bcfe37a8936/geponipekajidon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=tesla+model+3+owners+manual+2019PDF 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_off0001074b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F62 11000 bytes
SHA-256: c29f62ce66bc73126435b4904686a5e7e6644500476e1c0d80727f70116e4dfc
font_02_sfnt_off00013917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13917 18348 bytes
SHA-256: 5184c1db528beb6adc0b99176c7a0b4eaadbe21adcf28b211211a4bb380944c3

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