Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2ba1f5d0446400…

MALICIOUS

PDF

81.2 KB Created: 2021-06-29 20:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 02e795729611a9035a350547e0e867f0 SHA-1: 75254534d16561fe4f15687a94db1d237c9257bb SHA-256: ed2ba1f5d04464008a4e95f4d860513a10a2802063fc0ad34c2c2fd92103935c
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to potentially compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier strongly indicates maliciousness, and the presence of IP address literals in URIs further supports this. The sample likely serves as a lure to download further stages or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • 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://casier-a-bouteilles.fr/file/jozozokebosibiwikuk.pdf In PDF document text
    • http://ehomeforeclosure.org/images/file/mifapunakodologoxamugola.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d8f336683a83349aeb7c581c78e2f3a/tufoxitakuronafenorulaf.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/87982842930.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/zinipefisefow.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/9bvneeooluq6tr2qtdb4lkhrks/notoregazix.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/topelake.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/a75c3ec80230f102708427924288ce5a/lasotojadukuz.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1735bf230---pudulolin.pdfIn PDF document text
    • http://alkanboya.com/files/file///70986255186.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088299211752---95287439601.pdfPDF link annotation
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f946b909d---85488327192.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/6e6a69af66b9a769e53e6a92a9a13ffb/vapuserewifivi.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/wezugite.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac15b416643.pdfIn PDF document text
    • https://gilbertems.com/videos/file/7193387779.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/6132960341.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1ca241c9---87699629602.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609868f7d1c1a---sekure.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a153fc07b7a---53728291620.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c84c1def10f---53980432653.pdfIn PDF document text
    • http://chayka-svg.ru/files/silixiji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cause+and+effect+worksheets+for+grade+1PDF 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_off0000d6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFE 10976 bytes
SHA-256: 69f28f808a925f6569f1954d0029189b47e0371400a9614b897c44a5c013ee5b
font_02_sfnt_off00010864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10864 17888 bytes
SHA-256: cff76a62049b1c6ca8bc5c8f5f96e652b019cb364edc665ca3697b3f909a503e

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