Malicious PDF — malware analysis report

Static analysis result for SHA-256 4562a93036554a2c…

MALICIOUS

PDF

84.4 KB Created: 2021-09-17 00:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0845f5eccb5476d2907a0d2928effc16 SHA-1: 2485adb9d2c08f45338af703708dc89b6a3d5a5f SHA-256: 4562a93036554a2cef98404df1cf043f0dafffe8258eb38d2a43c45208f5dfc2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=watch+his+dark+materials+online+free PDF link annotation
    • http://polins.org/public/userfiles/file/90765927612.pdfIn PDF document text
    • http://www.farmaciabergua.com/userfiles/files/povilezadojixurujufa.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/32061110990.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/xedufuzutolugizaxe.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/dejunexapetal.pdfIn PDF document text
    • http://teresachild.com/upload/files/9881317506.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/932590053.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/tulejugasiwudafulun.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/p6eimqpb88l72edg6cdjt4v7vo/98570640280.pdfIn PDF document text
    • https://europartner2.pl/uploads/10889793092.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/db04e534ee6ad1c8bacfb84103d2834a/kusoxuwi.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/wolejerenuvukife.pdfIn PDF document text
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/79614211581.pdfIn PDF document text
    • http://vce34.ru/attachments/file/nakakegizedu.pdfIn PDF document text
    • http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/zevaloxututezigin.pdfIn PDF document text
    • http://yachtales.net/admin/userfiles/files/85669726124.pdfIn PDF document text
    • https://snf.styleguides.ch/userfiles/files/bujipe.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bafa76169c---57125194482.pdfIn PDF document text
    • https://hung168.tw/UserFiles/files/bujezoziniromujefeja.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/zezufukumemibowazirewi.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/najufegovijas.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b60788f64---guzawovabiwafufojitoled.pdfIn PDF document text
    • http://consultingexpert.eu/fckeditor/userfiles/file/nosodifajigediwaz.pdfIn PDF document text
    • https://ijpdua.com/contents/files/36513664453.pdfIn PDF document text
    • http://besteva.com/upload/files/43389905543.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_off0000e3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C5 18300 bytes
SHA-256: ec09592c82a1266951ad7187f94d82b5a2017f006653170ba30f04f4e82601e1
font_01_sfnt_off0001130c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130C 10828 bytes
SHA-256: 7351d7224046e83f2a46954bfd77631fd88eab72e19885c9f79442fa0d4bc3df
font_02_sfnt_off00012be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.