Malicious PDF — malware analysis report

Static analysis result for SHA-256 b83184066cc475cc…

MALICIOUS

PDF

66.8 KB Created: 2021-02-28 06:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 591e6ac715abe9a6376a2c7d4c9a3094 SHA-1: dcfe930e05fcdc5e8009b1a6c6867126e29d6df5 SHA-256: b83184066cc475cc421178ada2a7ba32084ab1f3bfb198e9023bd16f446bc542
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://mezovuduw.ru/award?keyword=mrs.+piggle+wiggle+book+activities PDF link annotation
    • http://saroforati.medianewsonline.com/3930145035.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/introduction_to_number_theory_textbook.pdfIn PDF document text
    • https://wajifisawebe.weebly.com/uploads/1/3/4/4/134480175/kapotajukofosubo.pdfIn PDF document text
    • https://pebizenif.weebly.com/uploads/1/3/0/8/130874023/nofofubebu.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/mercury_75_hp_4_stroke_oil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446289/normal_60230628435cf.pdfIn PDF document text
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/tokixurejudosu.pdfIn PDF document text
    • https://fujifarilopo.weebly.com/uploads/1/3/4/4/134483008/3467485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_600c5e1052646.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/what_is_the_angel_number_802_meaning.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/fobevuzizu.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/duzetis.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/3b996e.pdfIn PDF document text
    • https://bikujezojodu.weebly.com/uploads/1/3/4/5/134587809/6641479.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/zUGhgib/38968426230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459034/normal_5fdc52d0b1c21.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_off0000c8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F7 5496 bytes
SHA-256: 82bcce8c3889436ce24923ff01540fc1d77bea8b5adcab17783354acd0fb4630
font_01_sfnt_off0000dbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE2 9956 bytes
SHA-256: aaf1254974932e7e01cf740e756eb4875b6c31b04235c2ac93e54cfb5bdd068e

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