Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ed9d2054cbb4de…

MALICIOUS

PDF

78.4 KB Created: 2021-09-08 17:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9cb49304ab28cc50dadf24c2c5cd6e99 SHA-1: 35433b36391d2f31273a5dc2ceccd6035d714c13 SHA-256: 45ed9d2054cbb4dee574c10afd3b32a33c86cae030472ccaedb0bbc405523d0c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicative of a link farm. The presence of embedded JavaScript further suggests malicious intent, likely to facilitate redirection or exploit vulnerabilities. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a phishing or trojan distribution attack pattern.

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 http://winso.tw/userfiles/file/fumakufunoguna.pdf In PDF document text
    • https://menu2uplus.com/images/file/pasarozagodolagabude.pdfIn PDF document text
    • http://rilta.net/userfiles/files/sopajesusire.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/59933046011.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/vatunuzegira.pdfIn PDF document text
    • http://muszempilla.com/files/file/jivita.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/wedoxa.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/35872890337.pdfIn PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/jebamigesabidu.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/76564183342.pdfIn PDF document text
    • http://bandbaajabarat.com/ci/userfiles/files/xafobizilifojudojiredopak.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/vofinosovatuzadeguxek.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/67912575564.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/konixiropidasufalitibuv.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/13945510336.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/12508372538.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/36912100985.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/161364c4bea5f0---6399183835.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/zadidovixukilipodogim.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613024711b4e3---10476965172.pdfIn PDF document text
    • https://yasacompany.com/upload/files/desaxadi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/163c8036ef2919de8e61746cb3ba71d9/97749333075.pdfIn PDF document text
    • https://esvigo.com/upload/files/11462907919.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=practicing+the+power+of+now+free+pdf+downloadPDF 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_off0000cd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD36 17568 bytes
SHA-256: 2bfbfeff0dabe2bdd765e45ffd44239376d4fe3b89fac96303cc6b38f958e9db
font_01_sfnt_off0000fae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE0 10820 bytes
SHA-256: 3ce81dbda128a740ea4eb53f9e5aa875ad13b7b3b912584a5f09d14967c14437
font_02_sfnt_off0001139b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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