Malicious PDF — malware analysis report

Static analysis result for SHA-256 0276b4042a827260…

MALICIOUS

PDF

82.5 KB Created: 2021-09-08 06:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 065a127aefea97f6595abc3d5eb5b780 SHA-1: b99ea842a4cdc4316fdcb4a8e1f8b21bef606076 SHA-256: 0276b4042a8272606ea71cef2b129ebd20c414ca434f9ee9111745a3dfb6a1aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be hosted on compromised CMS platforms. The primary purpose seems to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://philabc.ru/uplcv?utm_term=procurement+manual+2018+sinhala+pdf PDF link annotation
    • https://phuketwebstudio.com/ckfinder/userfiles/files/73411025394.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/jowevagojepa.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800da9177a3---keriwatebadu.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/42f05cf098c5af9441553f65fce11cd7/womazefujigafe.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/65045993831.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/429dcd56b6e958b4916286ea540eef62/10886458773.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/xiduburajigijebozafije.pdfIn PDF document text
    • https://x-leather.com/radsportfiles/file/kimuresiditigagos.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b59d2229d7---56175456218.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/uj2drniluvqf20gaog7j0il27o/jibokezininaj.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/88902289983.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/tuletibiban.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f7a5dc9cb3cf360da634edd14bd90cb0/80066579139.pdfIn PDF document text
    • http://hanleyresources.com/images/veranoxuzizerajijikobizo.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbc1eaaf7c---63547098697.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-8-23/20210823230407925086.pdfIn PDF document text
    • http://spoilersmensgolfclub.com/clients/865201/File/37222765459.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612936168e0d3---tinigopu.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/71075374028.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/nilexerikopa.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_off0000dad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD1 11488 bytes
SHA-256: 7fa03b6e6df2deab6f0015d07c712b85ae0b314daec687f030ddaceeb9c77df4
font_01_sfnt_off0000f5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DED 17844 bytes
SHA-256: 3853178a4634444aae1b0edbcfb9267d636d8c5edd431c18ac1973a5ced4fc7e