Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0117ca3c61a4a50…

MALICIOUS

PDF

75.3 KB Created: 2021-09-06 00:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3e960cfdb07b6badca6cb9364378cbf6 SHA-1: d7e624fc25e275b096fe30d0cc61f892f0755a58 SHA-256: d0117ca3c61a4a50a3bef0f6142e6b8c3205c110287880f5d133a08060a0724d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, including one pointing to a raw IP address and others hosted on compromised CMS platforms, suggesting it's part of a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/9eaac53fa930682fac2ee67bc5230717/feguvukezewurumebosezavez.pdf In PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/rhgje6l3qcbg66sfilnbsp7k90/88770791482.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/59267798549.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097490748e17---27965550245.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/gapajujovobufupewe.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/zulironuperelotuzakaveti.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/lufutidewuvajur.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/kajubopofosa.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/darosovoli.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/dofunadamusiwadopifugur.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/vunevinenugozevuravur.pdfIn PDF document text
    • http://odontotecnicacoop.it/userfiles/file/70118117553.pdfIn PDF document text
    • http://ashioke.com/images/library/File/73702567270.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/balupoxuvojaj.pdfIn PDF document text
    • http://gzhs168.com//uploadfile/files/ninavofatujun.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/f8388000f743282ca25d4ccefb3c9e17/kidogudebababap.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124699b00889---65852961759.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/f0ae4e5e5cc2a432daa0ef7b80e844d3/79078814912.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/fivufabasat.pdfPDF link annotation
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c1e34ae0e---pojebajifukewarogurobejuz.pdfIn PDF document text
    • https://win-win-keiba.site/js/ckfinder/userfiles/files/rudexu.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/3a9c63f51f717ec713e31ee38f9132e3/90152662491.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/jedaxipi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=basic+telugu+words+in+english+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_off0000c1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FF 17180 bytes
SHA-256: 5300194bdf93e7ec19c524fe62e0e5a4f5d22f68e0332807822ebbc823366d4b
font_01_sfnt_off0000edaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 11140 bytes
SHA-256: f2145682e2317c5ecdbbe28479619794c78f32729a50a611ef1eddce46d8b9bf
font_02_sfnt_off00010782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10782 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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