Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91309d5e9cd3959…

MALICIOUS

PDF

67.6 KB Created: 2021-02-07 01:21:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 48d35770df7bc487d3d20dc921b6957f SHA-1: 1d34a3dff044b3657335faa87da47eb66ce654e3 SHA-256: e91309d5e9cd395935d733f2c1d7e977124334dbfd9bdfb10b566dc7c8d0d9f5
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://leonvi.ru/123?utm_term=runescape+fishing+guide+1-99 PDF link annotation
    • https://cdn.sqhk.co/ruzesowasu/5ADWjcN/egg_inc._game.pdfIn PDF document text
    • https://zamokofoviwikaz.weebly.com/uploads/1/3/0/8/130815095/4c016b.pdfIn PDF document text
    • http://zijiwox.iblogger.org/letter_template_uk_ks2.pdfIn PDF document text
    • https://cdn.sqhk.co/gedodupem/bieTpT4/roblox_toys_redeem_page.pdfIn PDF document text
    • https://sinitilelimokiz.weebly.com/uploads/1/3/4/3/134348988/16a80c8e39c84ab.pdfIn PDF document text
    • http://runatem.66ghz.com/great_is_thy_faithfulness_piano_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489058/normal_5fe79df0a04e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424036/normal_6014c802d5e58.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kikexufan.epizy.com/odia_song_free_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/hero_wars_guide_reddit.pdfIn PDF document text
    • http://madulok.epizy.com/44205238852.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/34644007153.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/tapirunevopopojolu.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/written_battle_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/podoraxirijataduf.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_off0000ccec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEC 5536 bytes
SHA-256: c224524c6e2e7ea2a0a8e246f84fea304eebb4877fa9de19a1920fdeef8d659a
font_01_sfnt_off0000dfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD9 9876 bytes
SHA-256: 9a76d0a0d57f4c7c35ae4054512d64bde795f56c1cfe90cddcb1173b44faed25