Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c69339e3e0e43f…

MALICIOUS

PDF

70.9 KB Created: 2021-02-18 15:13:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 088eac073b59beb62bb5572b11bd924f SHA-1: 76fd111b8ab8fe8cc3e3178f868763f746a64b6c SHA-256: a3c69339e3e0e43fbb7a1123b8c9e02e014582a36c7beba63ee95e0bf7395fae
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=mrs+potts+and+chip+tea+set+plastic In PDF document text
    • https://nadagedo.weebly.com/uploads/1/3/1/8/131858166/8476577.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367289/normal_5fdef1f48dfe8.pdfIn PDF document text
    • http://propovar.ru/45297627437ff9z2.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/454458726.pdfIn PDF document text
    • http://mivetys.xyz/c_vector_template_arguments1h2v7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443594/normal_5fcae83908b62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380073/normal_5ffdc61df3c1f.pdfIn PDF document text
    • https://lisevududotuwak.weebly.com/uploads/1/3/4/2/134265384/zugebedagosovajaxudo.pdfIn PDF document text
    • https://dogusomuribe.weebly.com/uploads/1/3/0/8/130814063/luvinog_diludubagafu_rosalijemu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_6008d1ed3d7eb.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/dobikasukavu/effective_leadership_styles.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/pokog.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/assamese_song_2018_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/bibetu.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/daxuwizi.pdfIn PDF document text
    • http://vuzozan.epizy.com/36060816173.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_off0000da3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3D 5168 bytes
SHA-256: 437a5d15036911b41d86a416096cf64d4bf4ae413ae53d91f0aaa2b93555a653
font_01_sfnt_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 10148 bytes
SHA-256: 7e98eca3a85ba2d06de3bf8581b919d8fe99684afe5c65e3342680a694345528