Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0ef5fa79fedeac…

MALICIOUS

PDF

76.8 KB Created: 2021-02-22 07:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1d40b2943075dcf3e6728faaa0affc17 SHA-1: 5b0b151a054affa1326420619d05f8c2ae534282 SHA-256: 4c0ef5fa79fedeacb885710ebc75fb4fcde2c5da333a0dfdc16d4cf40399c2bc
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://leonvi.ru/wb?keyword=300%20most%20popular%20words%20in%20english%20with%20spanish%20translation PDF link annotation
    • http://freds.space/kikobevosujagesu3b446.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/gchhKUj/the_last_survivors_series_bobby_adair.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450514/normal_5fe4a6d59e480.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/eiELjcF/black_friday_walmart_sales_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446017/normal_5ff4bde234b2f.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/jajelogipugoder.pdfIn PDF document text
    • https://mijipunipiju.weebly.com/uploads/1/3/1/4/131455283/7245601.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380530/normal_5ff6c4b40c2b4.pdfIn PDF document text
    • https://tisegibak.weebly.com/uploads/1/3/1/3/131380339/tajorofe_jenigiwaxevez_jepajobodebedun.pdfIn PDF document text
    • https://kubududowu.weebly.com/uploads/1/3/5/3/135349078/5609151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447278/normal_5fd7c63ed687f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383925/normal_5fcd7a64ab087.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/djiITlX/grandpa_movie_jackass.pdfIn PDF document text
    • http://clipshd.design/gb_whatsapp_apps_karna_haii2ho8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474734/normal_5fefc70f2b02c.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/fifuvibobaridared.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dexupanuwobazab.rf.gd/mailing_list_form_template.pdfIn PDF document text
    • http://muzasikogebew.rf.gd/zurabenuxela.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_off0000ed49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED49 5676 bytes
SHA-256: 157814922a15e4c63b5eb3226af9828a1e49ba6f56011958303d46dec782bd84
font_01_sfnt_off00010077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10077 11380 bytes
SHA-256: 9d2f548abe36b83c4876ac68a60b718bbd292ce2c6af2b4b0b169be09d4cf459

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