Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8803d51bc7231a…

MALICIOUS

PDF

67.8 KB Created: 2021-02-27 06:33:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 51e80da804c4ced2bdee2d65c9d3fef1 SHA-1: 3322e911021e3e0432a19a987e629af821389026 SHA-256: fd8803d51bc7231a6e8fc5f6de3f59afd8c772dc4ba8498700f99932e85073dd
196 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
  • 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://jacksth.ru/award?keyword=how+to+open+sharp+carousel+microwave+door PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379841/normal_6032248f4279b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5fdc498034d12.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/j5heUoz/six_guns_gang_showdown_mod_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/fTihjfp/romancing_saga_2_3dm.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/hhnNvij/meberagomu.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/iaAjb6q/90745528175.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/jalPvjc/30997508325.pdfIn PDF document text
    • http://gonimuliveza.22web.org/cacti_pronunciation_guide.pdfIn PDF document text
    • http://risurevisawibe.iblogger.org/lididopiruk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459479/normal_600dc3aa704b8.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/fwMkB2f/nuwapirovapomon.pdfIn PDF document text
    • http://xexejidabame.22web.org/cash_flow_statement_indirect_method_format_icai.pdfIn PDF document text
    • https://xumotisububilup.weebly.com/uploads/1/3/4/5/134591263/zuwafogopamik-bogekenewit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dazozelagur.epizy.com/16709753174.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_off0000ce02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE02 5424 bytes
SHA-256: 9e924078128432c1c432e6366970f1b0651aac8db3dde5d9ba606ddc9e8371bb
font_01_sfnt_off0000e05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05B 9888 bytes
SHA-256: 2d4521b37ba7d3da51c2ef9ef038c186d82688471b10cfbafbc94b1852b4d694