Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad444e40340e4a78…

MALICIOUS

PDF

74.4 KB Created: 2021-02-28 14:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 61052d4c8b3394eeddbefbdbd7969240 SHA-1: 6193413e50a9a9781bcf5ad0ea1d968689898007 SHA-256: ad444e40340e4a7856e4ef1398563ade38fe591e023bb7177830452ea3ddfccd
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://baarspo.ru/award?keyword=qualities+of+a+good+science+teacher+ppt PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461523/normal_5ffe65a289e9f.pdfIn PDF document text
    • http://divuwon.iblogger.org/demaxikuziluzinaguve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5fd7472adf624.pdfIn PDF document text
    • https://woteginawewe.weebly.com/uploads/1/3/1/3/131379999/vatavavopo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475854/normal_603a6c573616c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411483/normal_6018716d210bd.pdfIn PDF document text
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/xivirifigezikod-viwiponanurera.pdfIn PDF document text
    • http://zebizekesodu.iblogger.org/why_the_rich_are_getting_richer_goodreads.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopoxasemegivo.epizy.com/99863520762.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/become_a_tour_guide_in_copenhagen.pdfIn PDF document text
    • http://zuxamivim.epizy.com/ib_extended_essay_guide_history.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/how_to_remove_amana_radarange_microwave.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/a_simple_favor_movie_rating.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/data_science_interview_questions_amazon.pdfIn PDF document text
    • http://wokoziguroron.rf.gd/fabefokupupew.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_off0000e805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE805 5480 bytes
SHA-256: 863c329dc418472c00967747d921ca8c1666110777eda1c514f7bd3d13c72fb0
font_01_sfnt_off0000faa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA0 10136 bytes
SHA-256: aa2a842ec648b596988455895d54d122470dcdabe834de92a27b2c45bae57f8b