Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae867f87d6997832…

MALICIOUS

PDF

73.7 KB Created: 2021-02-02 17:21:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: da1f605df9b7f6fbcd40f8abaa6b0daa SHA-1: bbe08afaad539d8b6a5d1185e5b584c034dc2c83 SHA-256: ae867f87d69978322c5e02b2fbe45d3b76168a8e0105e0d163f247ebf2dcba5c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/aws?utm_term=report+complaint+about+school+toilet PDF link annotation
    • http://susobokilodos.iblogger.org/back_to_school_banner_template.pdfIn PDF document text
    • https://zojevobe.weebly.com/uploads/1/3/1/1/131163992/wemunaj.pdfIn PDF document text
    • https://tetuxexe.weebly.com/uploads/1/3/1/8/131871535/gasopazinuxoxe.pdfIn PDF document text
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/ea5e0.pdfIn PDF document text
    • https://vamotavobepud.weebly.com/uploads/1/3/1/4/131438348/zagojoda.pdfIn PDF document text
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/4529795.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvafinuvewabek.epizy.com/habibie_ainun_full_movie_mp4.pdfIn PDF document text
    • http://bidexegope.epizy.com/fewukebevasaxitukago.pdfIn PDF document text
    • http://numivonef.rf.gd/o_mundo_do_budismo_tibetano.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/xurub.pdfIn PDF document text
    • http://wubonaxe.epizy.com/esl_phonics_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/vububaganer.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/waxakipovekega.pdfIn PDF document text
    • http://gatokelemek.rf.gd/jiguziramupubujumedifob.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/73220401218.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_off0000e41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41B 5320 bytes
SHA-256: 1c3088b9719390b00ff7f12801c99d1c733a4f1fae6281339da18bcf632ead17
font_01_sfnt_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 10500 bytes
SHA-256: 87250b49d8ee32b6df932c78a4a78fca2cc74e751f8b0f82ddae82c0dfb08db3