Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39bbecfb9c5ca07…

MALICIOUS

PDF

42.4 KB Created: 2020-10-16 04:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f9cefb78868cb6cc50285e6c79292f21 SHA-1: bea03efce90a2d68e39e7447f533657950415f16 SHA-256: b39bbecfb9c5ca07954a3e01c3bcb3185ee9bbcdcfe2531be550ada739d63fd6
184 Risk Score

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://gettraff.ru/123?keyword=libro+aquella+orilla+nuestra+pdf In PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/bbded193e412e8.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/ea1eadc07ab.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/7a015d.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/decd27.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/gebigikixijori.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/wepepukuvejibi.pdfIn PDF document text
    • https://site-1041282.mozfiles.com/files/1041282/falcon_x3_user_manual.pdfIn PDF document text
    • https://site-1043373.mozfiles.com/files/1043373/root_explorer_pro_apk_latest.pdfIn PDF document text
    • https://site-1041926.mozfiles.com/files/1041926/25936136411.pdfIn PDF document text
    • https://site-1038910.mozfiles.com/files/1038910/18869634693.pdfIn PDF document text
    • https://site-1042624.mozfiles.com/files/1042624/gugokurineririvuwikixavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f875c59f31d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f88b8641e37b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f88dc41c4aba.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/1/0497/5899/4586/files/goal_zero_yeti_1250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9041/4230/files/go_math_book_5th_grade_teacher_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/6144/5276/files/65676587203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5639/7987/files/33523932170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ebddf5-b441-4fa5-97ec-54019fee2709/76915169748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ecea8b-b5b2-4cf1-b623-167edb8b15fa/37853768570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d1a1198-9936-49d5-8a82-ad3b899a5c53/kaniwadonifevugoduf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3ccd70-da64-45bf-acbd-c4eaecb4e17d/30934854229.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_off000063fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FE 5240 bytes
SHA-256: b2bf4298e288e31ad478adf4831d23c232a7db480b883c683e4802d6e99da17b
font_01_sfnt_off000075d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D0 11216 bytes
SHA-256: e481f65f28cc4b0981dfb9c5b07586cf80aab9a80249e1e22501dbae42a0df1e

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