Malicious PDF — malware analysis report

Static analysis result for SHA-256 645ca1f550fce768…

MALICIOUS

PDF

79.3 KB Created: 2021-03-08 08:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1d40e389fc93c6498ffac9a7027f401f SHA-1: b727603933863ae7454362efbe86ccc1bfcfbb69 SHA-256: 645ca1f550fce76896667cee51f7367bd8d289c15cdc1d13d3447904bbffcffe
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/award?keyword=example+of+reaction+paper+in+apa+format PDF link annotation
    • http://alexandreablog.com/oster_blender_chopper_attachmentuwwps.pdfIn PDF document text
    • http://sandwichhq.club/how_to_connect_logitech_keyboard_to_macbookjlfwu.pdfIn PDF document text
    • http://petrol-v-pol-price.site/33512040561hrw4b.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/bowflex_xtl_parts_list.pdfIn PDF document text
    • http://pss77.ru/how_to_tie_knots_for_fly_fishing96tur.pdfIn PDF document text
    • http://bikokobolo.sportsontheweb.net/34884957396.pdfIn PDF document text
    • http://persequenteamsohbet.com/how_to_pair_samsung_ah59_remote1sax0.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/how_long_should_a_home_water_softener_last.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_a106de3809ba444c9fded895753484e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/zetibamivana.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/marlin_test_answers.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/badomuku.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/abrahaminte_santhathikal_full_movie_utorrent.pdfIn PDF document text
    • http://betakudo.atwebpages.com/bose_rc-pws_iii_universal_remote_control_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/jefazopan.pdfIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_c29ec61ed9754c0cbac05bd519f68906.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/13906887326.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/akg_d5_microphone.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/80761349005.pdfIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_4e909413e21c4edb8d14260d395b1afe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorogamat/how_to_clean_my_cuisinart_pans.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/androidx_support_library.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE77 4796 bytes
SHA-256: 18daeb46979b7c47440287fd4f8e20a9ec9a9c7e0ccf157cb78117a8b720855d
font_01_sfnt_off0000feab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAB 10052 bytes
SHA-256: 8ed95d84110349761575ec5a6a44ac029716935b619d7820e005e70456cbf652
font_02_sfnt_off00012121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12121 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34