Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebb54a1dff5719b…

MALICIOUS

PDF

97.2 KB Created: 2021-09-07 15:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 594c1216ea41475290ade3bab2d524ce SHA-1: 2f495b5928a23b73bc295696197f883f5d771b3b SHA-256: bebb54a1dff5719ba2f46b67270deee1217398f64d258691b69c52228d60a9fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics suggests an attempt to redirect users to malicious sites.

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 http://blissworldbeauty.com/newerac2c/userfiles/file/33488027038.pdf In PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/468090303bb827910ad80477856abea5/sebaperupufi.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/37204595593.pdfIn PDF document text
    • https://ntc-container.com/upload/files/vikewibeva.pdfIn PDF document text
    • http://web5gstore.com/Files/files/37485885342.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/bigomidulot.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/filunexisegatagezoked.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/40191761220.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/vifajamom.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd48f3735e0---gikuxizurunukinitaja.pdfIn PDF document text
    • https://coverline.ro/userfiles/file/3062255584.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c369837f3b8---7602692915.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/numinenojalegam.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/86e39d461f90812fca77099775299eee/2467594708.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/tikunivoxedoxuluk.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/nelejawizazusesawaju.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/0b6fba1fc48f84b0bb2650151ff2027b/vutonemedenixebesuk.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/e1d58749bdb21466e0c360bb05ef8133/saxenesumubukigej.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/73167139457.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/20964495821.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/vugefe.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/leferuwoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ejercicios+de+passe+recent+present+continu+futur+proche+pdfPDF 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_off00010c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C80 10884 bytes
SHA-256: c312db9c2cfbdd50946247b9eff29f9d67e3078f2742d9f783627d4cb1d9cf07
font_01_sfnt_off00012593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12593 22272 bytes
SHA-256: 85780b9a70861782ad9b33a4bdbc56a0cfa51c87c444684a8fe5437c7eae7adb
font_02_sfnt_off00015e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1