Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d4ee047cf1022f…

MALICIOUS

PDF

72.4 KB Created: 2021-07-13 05:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b20522f62ea1b39d6c0d82f803c637a8 SHA-1: 0b02a5a98ec025216e9993a06aeb08b3975a34a3 SHA-256: 46d4ee047cf1022f38e3ebf579d3f122907fadca5435a50c0f9e2b06691d550a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains multiple heuristics indicating it is a link farm hosted on compromised WordPress sites, with URLs pointing to potentially malicious PDF files. While no scripts were extracted, the presence of numerous links to compromised domains suggests a phishing or redirection attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/1cf91bbf45c3d140c97d8c940b880a89/33219067981.pdf In PDF document text
    • http://duonglaohanoi.com/userfiles/file/rijidokigutulip.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c496a442d77---wixepasebuborikapura.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/225172eb2a10d2e9a52f34d2e378f34f/figepujoxoxijuzaxetatotan.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/radadejabaxulefidefevi.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/zeleledebinofigeraxa.pdfIn PDF document text
    • http://grabnerestriche.at/64734204125.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/kerakirupezubajegim.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/nebajidaguz.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb6f5ede2a---totorowuw.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160773a031d1a6---nivibavug.pdfIn PDF document text
    • https://led7.ru/file/49556154272.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/dc266faf867e501e1b282111fd729ce7/87155702487.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e03a5b5513a97138322fe29615215c74/25310341969.pdfIn PDF document text
    • http://armanetti.com/images/64637006316.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/46739243699.pdfIn PDF document text
    • https://thepainter.asia/upload/files/givepekagavuzafenanuw.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160df0877aad04---89094454155.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/94417682314.pdfIn PDF document text
    • https://jjpremiers.com/files/44716513579.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e73a4f439---dosukexepabunadupib.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/6830691341.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/1catb0phln0stohe5iqprdh7lt/fiwenuwalu.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/v73vcgpphp9alc8ks9m0091g4q/vipebuwuniwimuvegokujeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+give+yourself+a+custom+enchanted+item+in+minecraftPDF 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_off0000b7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7EB 11280 bytes
SHA-256: f42165931c483441f082f2ab52de389aae2624eaebc11e5e4a6d45db736f40cb
font_01_sfnt_off0000d20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20C 16076 bytes
SHA-256: 5a226701f91eb1e6aa025e6ab113707e133cc1df42ce3e566df4197f4304520e
font_02_sfnt_off0000fbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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