Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04fe44259ec6836…

MALICIOUS

PDF

72.0 KB Created: 2021-02-27 07:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b854affa2ab6dd9e9fc0a2621811d282 SHA-1: 6be5172dc5fc93ebbacbb5a28d674681f7feb112 SHA-256: b04fe44259ec68364a17161b7746c595cb8e336fc9b9ef34970fb1c0b008cdfe
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://fokemale.ru/award?keyword=private+peaceful+best+quotes PDF link annotation
    • https://cdn.sqhk.co/zarepowake/jaRibhd/6040190575.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/iidggge/kilosawor.pdfIn PDF document text
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/nozakutit-bedigibikadup.pdfIn PDF document text
    • http://gedawuxofawu.iblogger.org/candy_a_5001_manuale.pdfIn PDF document text
    • http://kasewokagirit.iblogger.org/how_do_i_reset_my_kindle_d01100.pdfIn PDF document text
    • https://busajivajikiguv.weebly.com/uploads/1/3/1/3/131384407/foxat_volajuvunepeb_xatamoza.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/bkjacjb/peguz.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/poresi/gawogasevunelup.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/gufovuwatojawevab.pdfIn PDF document text
    • http://rowagaparik.rf.gd/js_format_number_with_commas.pdfIn PDF document text
    • http://tidokapisu.epizy.com/vofovisi.pdfIn PDF document text
    • http://vawomebez.rf.gd/77092998237.pdfIn PDF document text
    • http://wepaxilex.epizy.com/green_forest_background_image.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/accidents_reported_today_michigan.pdfIn PDF document text
    • http://tifomoja.epizy.com/formal_letter_asking_for_job.pdfIn PDF document text
    • http://medomapex.epizy.com/ib_biology_magnification_worksheet.pdfIn PDF document text
    • http://jujeludapivibiw.rf.gd/betetajiwozev.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/54612022209.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/bowelano.pdfIn PDF document text
    • http://tuzotulerijenej.rf.gd/sodapexupisusibewozud.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_off0000dd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD92 5336 bytes
SHA-256: 88423884cf20f49ac84b1f2bbd343ac55a75184afbb4c95db0a6208608026a46
font_01_sfnt_off0000efce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 10212 bytes
SHA-256: 6aa3456b57e05a72c5383550d55230b5f92c4a4e89373a832c40ed73d4ba2023

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