Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e5acd8d2762ecd…

MALICIOUS

PDF

73.9 KB Created: 2021-02-22 21:31:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a3db05e49be07c9820c7ef79924814b9 SHA-1: 2668e0a16301368e88d8c5775c4f853b439ff5e9 SHA-256: d4e5acd8d2762ecddfda269392100425bdad750154c7ea7a4d9df5bc372b94b6
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://bologen.ru/aws?utm_term=watch+defending+jacob+online+episode+5 PDF link annotation
    • https://cdn.sqhk.co/letinumi/zgDjegg/3d_logo_maker_apk_mod.pdfIn PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/lumikuduzopez.pdfIn PDF document text
    • https://pabebubi.weebly.com/uploads/1/3/2/6/132695301/duxujuj_sefijabir_guvozojezi.pdfIn PDF document text
    • https://vorufiduwesonuf.weebly.com/uploads/1/3/5/3/135314955/3d818ec99a2.pdfIn PDF document text
    • https://nugaruxiboxora.weebly.com/uploads/1/3/0/7/130738781/bajozam_dujozosegutigov_malom.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/fe494e0acf1.pdfIn PDF document text
    • https://cdn.sqhk.co/tatudawo/gfyOiiy/fobofufokezibogekutunader.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/Eia83gi/jotadaxagusofanali.pdfIn PDF document text
    • https://cdn.sqhk.co/pujimuxuja/nYjaieA/disney_scan_and_cut_dx.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/7dce1c12e50.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/wovedukevikov/convert_html_to._net_core.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/justification_report_converter_utility.pdfIn PDF document text
    • http://mowigefugitixa.epizy.com/xotimubanemopegesug.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/lucina_super_smash_bros_ultimate_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/palmistry_guide_print.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_off0000e299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE299 5676 bytes
SHA-256: 01e4004c4d3623d63d515f00b613fdd07f6a969709b3d8c454d0a968f3e890b9
font_01_sfnt_off0000f60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60A 10796 bytes
SHA-256: 64674fd4d63cf495794dc13629f62ac9e743761bbb278b59b0e15b447f956b35