Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8e81f60b946f2d…

MALICIOUS

PDF

44.8 KB Created: 2020-10-15 17:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 85b4f867bceacfcb7f1a63d72ee5f786 SHA-1: 3d5daee4422701c3ee8752cdfea2c4921a4cf157 SHA-256: 1a8e81f60b946f2d19df9b6cf5d9d263448aeb68c97d2d6897e4d7964bfba2c4
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://ggtraff.ru/strik?keyword=nc+plus+go+aplikacja+android In PDF document text
    • https://rizebilawi.weebly.com/uploads/1/3/0/8/130814716/sijof.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/xukux_tuvobilik.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/fc206.pdfIn PDF document text
    • https://site-1039888.mozfiles.com/files/1039888/rofumilodojupunegibureje.pdfIn PDF document text
    • https://site-1048178.mozfiles.com/files/1048178/xipajal.pdfIn PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/34366396082.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/29932f71.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/sakibugimakizej.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/kezarikejeliv-vuvinilewi.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/momobif_gobekewikame_rabir_jusixopete.pdfIn PDF document text
    • https://site-1042629.mozfiles.com/files/1042629/19629279751.pdfIn PDF document text
    • https://site-1039932.mozfiles.com/files/1039932/42167910188.pdfIn PDF document text
    • https://site-1040099.mozfiles.com/files/1040099/vamunamakorunafisesi.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/cfa6e37f0d0.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/ximudofotona_bewufomobutaxip_wadowupez.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/zimikobo_lolal_fosovonebeb_tanawe.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/zuvekazabuz-topofelo-gupolekodojavo-ponabiloxe.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/tajokakapuzavil_popolutev.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/1/0497/1164/4851/files/que_es_una_variable_en_una_investigacion_ejemplos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2337/4752/files/sobixaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/navajos_wear_nikes_a_reservation_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/lingua_latina_teachers_materials_and_answer_keys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/1485/0213/files/china_lol_summoner_search.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_off00006dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBA 5352 bytes
SHA-256: ae17746a92153d5beb62e6fc179bc0c4fecd9882a0e82d907afc197cc674ace4
font_01_sfnt_off00007ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFE 12072 bytes
SHA-256: 9e817920cf9dfa9bb79c5b5e76be9902e7bd85cb2847f77c0f379a039a7bd4f1