Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4af2f9abcbcd33…

MALICIOUS

PDF

66.7 KB Created: 2021-01-29 12:06:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 664a5af10b9ab4ebd1b501d0877d400a SHA-1: cc3e95fd388a98d506b592b639a1ff8c8c18fd63 SHA-256: 0b4af2f9abcbcd339f08cb4dc727c8190645368a031593a8f9d531c0c5f2e891
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=music%20tiles%203%20ad PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456143/normal_5fd85a4ccdd0e.pdfIn PDF document text
    • http://olymptrade.buzz/departamentos_del_peru_con_sus_capitales3i7w6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475380/normal_5fcd064de3390.pdfIn PDF document text
    • http://ihsteam.ru/authority_versus_freedom_in_educationmluc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_600d1635589f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492281/normal_5ff2206b31e03.pdfIn PDF document text
    • http://igbusinessabouthelp.com/3771626586ac2jr.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/gezizefefififa/68649127510.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/44771766053.pdfIn PDF document text
    • http://xopozajuve.epizy.com/dotujak.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/agile_performance_testing_best_practices.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/97178583630.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/ukulele_tuner_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/bazoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/36128370877.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_off0000c93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93E 5008 bytes
SHA-256: 8c663a77c5d9fc790f0c30e15076feae909fd9276473d99ac4e1ec29d61832ce
font_01_sfnt_off0000da5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5E 10476 bytes
SHA-256: 866ed1167c229c319faf7deff9432b83d0e13ed5a911b4e967b93e72aec18ffa