Malicious PDF — malware analysis report

Static analysis result for SHA-256 7756dde701124dc3…

MALICIOUS

PDF

66.2 KB Created: 2021-03-01 22:54:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d0ae5e2c2ad9892ddb664cfdea1024f5 SHA-1: 8345d7f908e176794192afc1e995adb83a39516f SHA-256: 7756dde701124dc3bd25ef5394fe8646283243328a46c7f825a044cb8438752f
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://gimoguvi.ru/award?keyword=bright+starts+automatic+bouncer PDF link annotation
    • https://jojiwunu.weebly.com/uploads/1/3/5/3/135387754/repesezonumu_muwazu_lejaj.pdfIn PDF document text
    • https://zudomizat.weebly.com/uploads/1/3/5/3/135308615/zudad-gamamag-detovegabubamu-pisok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476274/normal_5ff33ba15bae7.pdfIn PDF document text
    • http://favodokoleti.mypressonline.com/avaya_one_x_communicator_for_mac.pdfIn PDF document text
    • https://latoratepowubum.weebly.com/uploads/1/3/4/7/134713938/pinifesufoxasur.pdfIn PDF document text
    • http://wukifiduputafeb.22web.org/mogevipedibatowu.pdfIn PDF document text
    • https://mikedexe.weebly.com/uploads/1/3/1/4/131452733/juzuvubapebame.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/miwolezedubujoz/cafe_racer_mod_money.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/pdf_burdah_imam_busyiri.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/matuveribomuzobategogeji.pdfIn PDF document text
    • http://jugemunorosiwo.epizy.com/47095504287.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/26016598834.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/kerapodalumapawepopowakok.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/before_sunrise_movie_english_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/categorical_data_analysis_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/2009_audi_a4_cabriolet_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/hp_deskjet_1512_scan.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_off0000c573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC573 5372 bytes
SHA-256: 83f027fa7e225fea4f9f0a14ed0293436db175fb37ab5b0b227b37b35f2a92a0
font_01_sfnt_off0000d791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 10592 bytes
SHA-256: 64c25c6e919cd6bbf69cbb9a7696d915e874f39b42fdf45e3dc5a372904fa654

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