Malicious PDF — malware analysis report

Static analysis result for SHA-256 8242266adad07b5d…

MALICIOUS

PDF

44.0 KB Created: 2020-10-03 10:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 1f5372c58044b070df9264a309fa1168 SHA-1: 1b77ae25664480fd800032112843a0d12e9a3d0c SHA-256: 8242266adad07b5db511c613ca6bea3cc0d80d5106912228e165cc3c44a929d2
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=lfs+araba+yamalar%25C4%25B1+mod+t%25C3%25BCrkiye In PDF document text
    • https://site-1039632.mozfiles.com/files/1039632/gapebun.pdfIn PDF document text
    • https://site-1043404.mozfiles.com/files/1043404/25937476868.pdfIn PDF document text
    • https://site-1037005.mozfiles.com/files/1037005/99785665083.pdfIn PDF document text
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.pdfIn PDF document text
    • http://files.gnv-daerligen.ch/uploads/1/3/0/9/130969889/nagomonifida.pdfIn PDF document text
    • http://files.alabamaasda.com/uploads/1/3/1/3/131380618/d193f08d09.pdfIn PDF document text
    • http://xawibix.togethergolden.com/uploads/1/3/0/7/130775162/faridurugafipiwo.pdfIn PDF document text
    • http://files.northposeybasketball.com/uploads/1/3/2/8/132814826/malavedozobefuv-xufopoxazetaw-nikozeta.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/1/0454/7074/4742/files/14400054403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4491/3571/files/mega_man_10_wily_stage_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4298/2046/files/looking_for_someone_to_talk_to_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8591/7088/files/non_homogenized_milk_chunks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3812/5475/files/fuxutunidukewejujikana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/ncg_xtreme_lansing_showtimes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E0 5452 bytes
SHA-256: a8fe3b662f9255e390b6e3f2187193ba57937c95d1e8483580733310a54f0fa3
font_01_sfnt_off00007330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7330 2060 bytes
SHA-256: 655a45b7c4360b67b831a9307ecf773c264152471632f82d33f75aaee1096450
font_02_sfnt_off00007c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1E 11852 bytes
SHA-256: 1fdef87a21bfbb0b613fa2ebb19ba88f91092bdf76547f46d499125d55bd7d98