Malicious PDF — malware analysis report

Static analysis result for SHA-256 db45a731b8d3a6a2…

MALICIOUS

PDF

68.4 KB Created: 2021-02-03 02:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 718498be553d8102db590e06cd6d9d36 SHA-1: 70225811d7c654339b6bb102656d1ad5b5c63fbd SHA-256: db45a731b8d3a6a29507adaa51e6ef7b55f0bfca5681a727c719e2332726653e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=guide+champignon+comestible+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489713/normal_5fe2ef59425c3.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/myanmar_wikipedia_bahasa_melayur1qvr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418788/normal_5ffbe0d097aa2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475559/normal_5ff8648f25546.pdfIn PDF document text
    • http://pressit.space/727134113787n4lj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369911/normal_5fee67eb292aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413363/normal_5fc5aabd6d7a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388293/normal_6003d8f767ded.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/jesidofefe/2768380464.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/xamarin_android_sdk_offline_installer.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/apparatus_film_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/12791701423.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/sheetrock_hanging_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/wetin.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/delamu.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_off0000cf12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF12 5644 bytes
SHA-256: aa5910f1c5f6a5cc5f32aec58563e162e951ae399f65c7ea779f8c961b2718d0
font_01_sfnt_off0000e220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE220 10100 bytes
SHA-256: a7a0c0f8b0a96af7f1b040b5649db79acef6c57123fc6468c10ac647ca08fa26