Malicious PDF — malware analysis report

Static analysis result for SHA-256 87717fbc94411239…

MALICIOUS

PDF

73.6 KB Created: 2021-01-25 19:19:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 57d968f8fcde9a5141e371a9e13d2352 SHA-1: a6b836ee7cfe9068eaf8fe5413157d35acad937a SHA-256: 87717fbc94411239d4d98b1fd2046e4c850576f05f50957e859dc55a3e4defd1
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/wb?keyword=dropwizard%20testing%20github PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460066/normal_600ece0ece741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_5fd9987adeb0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487916/normal_5fd8070da3b37.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/safusesaro.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/jojawenoxaxo.pdfIn PDF document text
    • http://batezelokev.iblogger.org/back_to_the_future_480p_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_5fd7565809ae4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477373/normal_5ff4aff8274d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391000/normal_6006245647014.pdfIn PDF document text
    • https://lobixeximoruse.weebly.com/uploads/1/3/5/3/135319822/livazimepikogala.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fezenur/ielts_writing_task_general_training.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/wallpaper_minimalist_black_and_white.pdfIn PDF document text
    • http://gupexofuvesok.epizy.com/atomic_number_and_mass_number_practice_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/csir_net_result_2019_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/baahubali_movie_tamilrockers.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_off0000dff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF5 5472 bytes
SHA-256: d9745005664947a5f5f746af4b2a774755fdfbcb72bf774498b07bfcda65607f
font_01_sfnt_off0000f2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A1 11428 bytes
SHA-256: 565c8c537f40df17222b03bfaddde385aa2f35953e7dd5446a5d459374256911