Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94c57d3b52f5c51…

MALICIOUS

PDF

78.6 KB Created: 2021-02-26 19:10:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 43ff3fb14a0ac54cb8d43aeead5e4556 SHA-1: 36a26732af3ef02e3328d3849f968ec853f3387a SHA-256: f94c57d3b52f5c513240d445464ec6ab6ee84be36838f82fdcd13d65749542da
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://xajibur.ru/award?keyword=tableau+your+data+2nd+edition PDF link annotation
    • http://efarbok.xyz/cestui_que_trust6u84c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_6014b035b16e6.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/eqG8heR/free_netflix_account_hack_november_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_603271f4d029d.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/fd8mjbo/twilight_struggle_cards.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/fidygiB/metaphysics_aristotle_free_download.pdfIn PDF document text
    • https://libirobu.weebly.com/uploads/1/3/5/3/135336219/pipobaz.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxarabo/jh1geia/chores_list_excel_template.pdfIn PDF document text
    • https://cdn.sqhk.co/jebuxanit/gjghjcW/how_to_get_lv_filter_instagram_story.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5fe18c6334080.pdfIn PDF document text
    • http://topmassage.net/fraser_valley_auction_market_reportijfag.pdfIn PDF document text
    • http://2220202.ru/849732027803xdpz.pdfIn PDF document text
    • https://cdn.sqhk.co/gidufulelav/iekTT9Q/96388713636.pdfIn PDF document text
    • https://cdn.sqhk.co/saxamabewido/fxsgcr6/stick_hero_fight_mod_apk_android_1.pdfIn PDF document text
    • https://subamepowesita.weebly.com/uploads/1/3/4/8/134875458/fiwevuza-mumubomupap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF891 4964 bytes
SHA-256: 92c27a44fd453e8553f1aac5f9f700a85e31c8f2e43029de0fb9d3c2ed078b61
font_01_sfnt_off00010984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 10672 bytes
SHA-256: 92093afaf020d20d35beb4f58717f1e75fa1bbfcc557cd1bea54b717a5ecf6ae