Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48eb35db3b465e3…

MALICIOUS

PDF

58.5 KB Created: 2020-10-02 23:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f0675510f7dffbd404ca9510ee392cce SHA-1: 2314dd4aca21c579f2e855adda91d77bcffa2f83 SHA-256: e48eb35db3b465e3d6b2a1e574c315f6d840976599424f237a1a291d5f4f471b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed for SEO manipulation. One prominent link redirects to a known malicious infrastructure. The document's content, though heavily obfuscated, includes a URL that is also present in the heuristics, suggesting a deliberate attempt to drive traffic to malicious sites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://cctraff.ru/strik?keyword=libros+gratis+pdf+caballo+de+troya+9 In PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/70724846548.pdfIn PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/bunitinetozasebomi.pdfIn PDF document text
    • https://site-1039970.mozfiles.com/files/1039970/vikumosa.pdfIn PDF document text
    • http://files.eugeneglassroots.com/uploads/1/3/2/8/132814194/b71097ae5.pdfIn PDF document text
    • http://files.sandyblaisdell.com/uploads/1/3/1/3/131383373/xifiwajokek.pdfIn PDF document text
    • http://files.envirobagsdirect.co.nz/uploads/1/3/1/4/131482819/2766436.pdfIn PDF document text
    • http://files.h2oaquapremium.com/uploads/1/3/2/6/132682899/1501475.pdfIn PDF document text
    • http://files.mrstrizz.com/uploads/1/3/0/7/130775974/da704b646.pdfIn PDF document text
    • http://jitaf.thebratsmovie.fxlda.com/uploads/1/3/1/4/131406149/4864551.pdfIn PDF document text
    • http://files.myardysslife.com/uploads/1/3/1/3/131380786/3576291.pdfIn PDF document text
    • http://files.oakleafband.com/uploads/1/3/2/6/132681236/keridikeputopajeja.pdfIn PDF document text
    • http://dunuf.sprinklinnd.com/uploads/1/3/1/4/131438216/1798660.pdfIn PDF document text
    • http://files.blueseavacations.net/uploads/1/3/1/0/131070062/tizekanesaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F0 5344 bytes
SHA-256: c130298d9e81f5b56a4e61508a6b14cd781e0f33a7c70f8898350766b6585b46
font_01_sfnt_off00007929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7929 3904 bytes
SHA-256: efe481dbb1bcd4f407358889c4460986ee16c3437e3b7d944f4d613c56d0496b
font_02_sfnt_off00008894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8894 15600 bytes
SHA-256: 00072962c35fb302811cd05bf8ee739a10202fed10cbb70a5ad65f0c47f58da8
font_03_sfnt_off0000b804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB804 16096 bytes
SHA-256: 301fb2f14aa1e9a5cf8540ebf40f17e8311eb9ba756e1d76589e408feb703965
font_04_sfnt_off0000ccca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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