Malicious PDF — malware analysis report

Static analysis result for SHA-256 09de017f5e519f58…

MALICIOUS

PDF

40.6 KB Created: 2020-11-08 09:31:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bc01a6d47e305aaa1829fe341804dc95 SHA-1: 1474156de51b491b6b4924d46d47d497a3b136dc SHA-256: 09de017f5e519f58cb2d72ff8258eff6cb6af7d96f99571737a61692faacbb5e
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffking.ru/123?keyword=r4+zoning+definition+georgia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8e8bca4549d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5f8f3fe5c3a0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kebupud.files.wordpress.com/2020/11/16674380217.pdfIn PDF document text
    • https://xebefawu.files.wordpress.com/2020/11/48378279114.pdfIn PDF document text
    • https://jogamoje.files.wordpress.com/2020/11/28349294971.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/bluebeam_revu_2018_user_manual.pdfIn PDF document text
    • https://pozaxatugifu.files.wordpress.com/2020/11/41068061239.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/las_carceles_de_la_miseria.pdfIn PDF document text
    • https://niwafok.files.wordpress.com/2020/11/dopinajokobibepupix.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/6th_grade_science_test.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/google_drive_john_wick_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/19329823862.pdfIn PDF document text
    • https://motulod.files.wordpress.com/2020/11/tiwoloza.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AB 5008 bytes
SHA-256: d860dc148d9b060265221a4a1a456095bf7039cc3fd8b2d552f7c23972a4b0c9
font_01_sfnt_off000073d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D7 9800 bytes
SHA-256: fb81e6294f4c888e43f4ff8074e3db268a6b7c313973ff4964279f1cbd977d05