Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ec19d13c962575…

MALICIOUS

PDF

40.6 KB Created: 2020-09-30 01:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4f7327841eab3e3b9056be07d34f2022 SHA-1: 1beea85b0ec9b511e2cce09ddf1831322f1a6d67 SHA-256: 43ec19d13c9625753a116e27b4bfa459514e033a758dec9fd5954ea843c5103a
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://ggtraff.ru/strik?keyword=advantages+of+single+parent+family+pdf In PDF document text
    • https://site-1036858.mozfiles.com/files/1036858/6316357127.pdfIn PDF document text
    • https://site-1036991.mozfiles.com/files/1036991/fijerulibukelebebiwu.pdfIn PDF document text
    • https://site-1036991.mozfiles.com/files/1036991/76046707621.pdfIn PDF document text
    • https://site-1037842.mozfiles.com/files/1037842/balugelexaboditurob.pdfIn PDF document text
    • https://site-1037061.mozfiles.com/files/1037061/51200284775.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/26376179382.pdfIn PDF document text
    • https://site-1037048.mozfiles.com/files/1037048/56198381786.pdfIn PDF document text
    • http://files.my-luxe-boutique-4you.com/uploads/1/3/1/4/131409693/7744942.pdfIn PDF document text
    • http://suririg.celebratingyoungandstrong.com/uploads/1/3/0/8/130814058/6815508.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3175/4902/files/14038007293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9477/7760/files/8235939933.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_off000060a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A0 5512 bytes
SHA-256: cb28980ed5a8895b4b60cf552cb68a3ee166821c52323be87475420ac187e8d7
font_01_sfnt_off00007362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7362 10168 bytes
SHA-256: b0edcdfdd01b90e047859c0ed2dbc29e738b6e06baf84fde95c2947a0ae2ca01