Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd9b3f4912da531…

MALICIOUS

PDF

72.2 KB Created: 2021-02-08 00:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e93b3481f70c0c4faefea077eee10407 SHA-1: ca13846c9124d4c0c3c12ee349989b235d9c6859 SHA-256: dcd9b3f4912da53123fd7e5270608b1881d4273040b0995786be35f7728d5cc7
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://druttle.ru/wb?keyword=android%20app%20auto%20update%20without%20play%20store PDF link annotation
    • http://trylait.pro/manual_de_liberacion_para_niose7h6x.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/mjc4tid/zigikepulobutimeturu.pdfIn PDF document text
    • https://paxuwuberuluza.weebly.com/uploads/1/3/1/3/131380725/6368447.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/hzQnieu/1818241138.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/JEgje6u/infection_fatality_rate_covid_19_fox_news.pdfIn PDF document text
    • http://gprofights.ru/gagujusopolegukf1e3.pdfIn PDF document text
    • https://rogenogenitel.weebly.com/uploads/1/3/4/3/134316557/4795207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467950/normal_601410aa0d315.pdfIn PDF document text
    • https://pimelitapata.weebly.com/uploads/1/3/1/4/131454500/nikuguwefomipemar.pdfIn PDF document text
    • http://lerob.info/76914200408gseew.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/zupenafud/11504581653.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/23671142888.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/introduction_to_vertebrate_zoology.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/24494127399.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/dormins_rage_trophy_guide.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_off0000dc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC96 5228 bytes
SHA-256: 3915355219acf3b7b6e196e62ea4e147953a051a9e373221eeb4125d8bcd0f21
font_01_sfnt_off0000ee70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE70 11204 bytes
SHA-256: 70667f9b2e199e6857c1a9a9fc0e8f01e393f2a70cfc56357069bfa5a32a9634