Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a1945de7d8b5b6…

MALICIOUS

PDF

55.3 KB Created: 2020-10-04 03:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f8522b148de2f2e3ee9c9552f43a3db8 SHA-1: e7fa08677d4eace564277b8666be5f27c95e2396 SHA-256: 88a1945de7d8b5b6be1228b4c00fdb14612bb37ba40b7f574b387b0099d0dbb8
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=marat+sade+nida In PDF document text
    • https://site-1039577.mozfiles.com/files/1039577/70946126457.pdfIn PDF document text
    • https://site-1042665.mozfiles.com/files/1042665/19485093947.pdfIn PDF document text
    • https://site-1038744.mozfiles.com/files/1038744/72459006033.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/66687320927.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/denatajekugi.pdfIn PDF document text
    • http://files.davidheinick.com/uploads/1/3/1/4/131437091/komikajunudate_tasixenuzesuli.pdfIn PDF document text
    • http://files.rawthingsonly.com/uploads/1/3/0/7/130739190/gobuwuxinisaz-bafumuret.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/nirodivo.pdfIn PDF document text
    • https://site-1043453.mozfiles.com/files/1043453/bekepa.pdfIn PDF document text
    • https://site-1037844.mozfiles.com/files/1037844/35984856542.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/1/0497/4372/4698/files/gartner_magic_quadrant_crm_salesforce.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_off00009d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5A 4792 bytes
SHA-256: 69127b24b114e15dda784a4a6824b7502a2452f1bba16c73d5f8e45d1a6c09f7
font_01_sfnt_off0000adb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADB9 10312 bytes
SHA-256: 11806aa2bdf1162bbbe99fc6054f5ecbc8e5925b1bea56eb8c8aaf4f39e9c3fb

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