Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd41cd88b62b3dd4…

MALICIOUS

PDF

102.0 KB Created: 2021-06-27 03:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80acc6892af5014570e98e4581a2cb3a SHA-1: ad554c145a503177160b91ccf7472f545cc49b03 SHA-256: cd41cd88b62b3dd4150fc8420a71b703b112d613ea6cbce794e29de1f978b92b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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 https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/a120450884407e54bcb16f90d19bb057/14668945520.pdf
    • http://uppercanadatwocylinderclub.com/clients/877835/File/99236935473.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/5ed1a996711f9fca042e53f00d5eccb6/83129458750.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/dbb5695f50c7b91e9503b45dd03db350/95523291053.pdf
    • http://seoulmenu.com/uploads/files/posenipawuvuwamepij.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ac721247c---xosotijixilulujabofot.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cda22a078---laruvufe.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7512c111e5---gixegof.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/39340995815.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092177cc1801---nizoxevolejudowagito.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608102b136a89---44187923289.pdf
    • http://stevis.cz/files/file/remezepevuvelipixaxi.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62cbdfb16---woweliden.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d5583a6103c---joruxisexufumetafobika.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/1cc514d9188eccc3cde488558e815c4c/guxidiwuxoxutotinamiweme.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/98159c83929a140bd3622fa0682cf221/wogim.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607236c062480---gogisuzubarif.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607327bd44525---48817630962.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2e7106b70---tolelesukuke.pdf
    • http://cuatro-pr.org/sites/default/files/file/3554060102.pdf
    • http://pagyesa.org/userfiles/file/20210616065639.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/74dd94f0dd19110ee1cc69a76546ef8d/48385977563.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/1841c9aa855482f856861413df69d3df/101137094.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=volume+of+1+mole+at+stp
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012991.bin
9b3dc65d5024a98823ad204056f9ddc1bc8fff0ac7f2ef1f994e6f1ec3f1b243		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12991 18132 bytes
font_01_sfnt_off00015993.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15993 16792 bytes
font_02_sfnt_off000171aa.bin
7a9ba63244ac1dc814e063100b4d89bf510f87763c7a450d46b8e9cd9d859ba8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171AA 10344 bytes

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