Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93346342e44e0ed…

MALICIOUS

PDF

76.0 KB Created: 2021-09-04 12:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cbf78d5cbb57f380293ba4b7cc332366 SHA-1: a0793a50abb3ae4ee7498aa14913f6c233ee4488 SHA-256: f93346342e44e0ed2bb6a308ed0c3852b2ee68a0ac8cbdaccdf316eae42bd0ef
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of links pointing to various domains, many of which appear to be hosted on compromised CMS uploads or disposable hosting. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the structure and numerous external links suggest an intent to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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://lamorenj.com/userfiles/file/sikimogugu.pdf In PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ab05b9e6191---73620507690.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/17768478547.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/80849083004.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/49204274537.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/6524564537.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/hacv0370f57plv2svv1pv5okhk/rodonegosokokukaxun.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/76650483357.pdfIn PDF document text
    • http://teifsepahan.com/files/file/xolemifojokiwamato.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/96198746365.pdfIn PDF document text
    • http://hoigolfbinhthuan.com/users/files/73712032725.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf40badce6---nuveserigixirudowawon.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbe38958e2---polonewewurik.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/wazelafafemosufitonolo.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/ziwazekozagupuvasikisu.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/161061b7550022---99205501804.pdfIn PDF document text
    • http://asvpp.fr/pdf/volovevet.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/r6lsdovj2jo7g993h5vr32j0j9/27817631480.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/301dhbitbg68hct3rl6t5f0b2v/70411911182.pdfIn PDF document text
    • http://cfacgroupe.com/uploads/FCK_files/file/26130345598.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607387da7fdb6---88392486438.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e0c0e4c3---tuxejopegojodojo.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609da10fe3560---76825900021.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=tyson+foods+annual+report+2018+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_off0000c13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC13A 11080 bytes
SHA-256: 162e034cfd964b4fc0a5ee603fd51f8f68c1ce333b07f0f0bf45d8fd4accbe66
font_01_sfnt_off0000db4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4F 17808 bytes
SHA-256: cdaf34d3c47022bc2e9aa540e9eba10b00b390bb7d8803447ce68c43e2a423c6
font_02_sfnt_off000108dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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