Malicious PDF — malware analysis report

Static analysis result for SHA-256 e465fc6882e02c81…

MALICIOUS

PDF

81.1 KB Created: 2021-08-08 14:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 56657150a93be60f5b3c0377e8ccb9c1 SHA-1: eb58cb025402fa2f407155bfa8345f513e269086 SHA-256: e465fc6882e02c81697d0ed66634ff5ce692a2b86f5e1f0292133a39ceda4cbc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. It also features numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/cb2d08b714398a0788a0b585be2cd668/rulamuxateximabegedezir.pdf In PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/refevi.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f76d0494be---tunafogilemunarelubomemu.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/tujid.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/vuxiforuwewuser.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7b6281194---jatefiput.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/gejerad.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/75975485886.pdfIn PDF document text
    • https://tndvn.com/js/ckfinder/userfiles/files/tajutatajapiregap.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/rilewepuxidasaleladak.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/39670625963.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/msi9m63j0qitafmirgjgk9l571/2652112486.pdfIn PDF document text
    • https://mahae.hu/files/files/52700364878.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/55589593423.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf111a9f14---4343706616.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/28505480976.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ffb5616b679---xunipekubafa.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941e04bf19c---muzexebugifu.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/23e58fd6ea6b9535b2295177f7d13e1d/48596273193.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/72794374966.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/1303e924c1af55dd19164d4757957074/bibasapenuduvomasabemu.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/5305b2c3f96b77fe469a1af845653f31/sudem.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/84940119924.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092322a7491b---gifupupas.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/4a22faea5de2438ae239a4514ae36aab/16254039799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=my+solace+alanea+alder+pdf+portuguesPDF 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
    • https://www.amazon.com/dp/B07P9BG7VCIn PDF document text
    • https://www.amazon.co.uk/dp/B07P9BG7VIn 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_off0000d72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3F 16596 bytes
SHA-256: 37dd616028a6f7397ed0c26200aabf68504696739ba8d14c2f9795a35bb25ff7
font_02_sfnt_off00011a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6A 10912 bytes
SHA-256: a6d8dc2bb06ce45e3e21d6465fcb891413536333b262f364fee38a2fa78acaaf

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