Malicious PDF — malware analysis report

Static analysis result for SHA-256 65435100980ec400…

MALICIOUS

PDF

71.4 KB Created: 2021-02-01 08:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f91d28b86564f8093e2bd216841a0a23 SHA-1: 88ff33ab33b5a7debb45c64d8e877fbd7e7cd529 SHA-256: 65435100980ec400517a756891f246b274b06116ae6bea629af2904badf36feb
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=partita+bwv+1004+guitar+pdf In PDF document text
    • http://armada.technology/19402924022evyyf.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/gVCYgj2/amazon_echo_dot_setup_without_app.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/MhiiigL/archero_co_op_guide.pdfIn PDF document text
    • http://freshmind.net/84847394739bm56t.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/a1je1ZB/nasa_website_asteroid_warning_2020.pdfIn PDF document text
    • http://xodulik.66ghz.com/93902018039.pdfIn PDF document text
    • http://55571.ru/que_es_la_lectura_selectiva5umyy.pdfIn PDF document text
    • https://lolozodosut.weebly.com/uploads/1/3/1/6/131606575/dekezeruwimezo.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/dFOdqjg/twisters_ice_cream_cafe.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/megodipewukitoj/borderlands_tps_claptrap_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/fugupomunubopovinezito.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/gajumubivaxipoxis.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/tirututukivolixinetux.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/in_vitro_anticancer_activity.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/40402650212.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_off0000d648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD648 5576 bytes
SHA-256: d1bab4e328a42090ef64b7be6eeb5dd2e6b836069aa1f74af30ac99de5c328e4
font_01_sfnt_off0000e976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE976 11748 bytes
SHA-256: f2c4a1e9b09937f6b6c96c6fd478d79c2efb49bfae30337e13703a061350e456

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