Malicious PDF — malware analysis report

Static analysis result for SHA-256 da31fce847dc5f73…

MALICIOUS

PDF

71.4 KB Created: 2021-02-15 06:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4c23ffb6b60eec35bc30e0d0c1135a3e SHA-1: 0fce3855e78a465b4c1be7018b7ea9a56e11c581 SHA-256: da31fce847dc5f73be2d6013dfeba222952d841c037e93f0f986191da2213eba
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://jottigo.ru/123?utm_term=merck+veterinary+manual+citation PDF link annotation
    • http://art-practice.org/chicken_goujons_tesco_halalc4asg.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/HgicMjg/bewigabetatikirek.pdfIn PDF document text
    • http://thiswaytovogue.com/beeruva_telugu_movie_songs_free64o9v.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/KhgCIic/windows_10_change_taskbar_text_color.pdfIn PDF document text
    • http://salestore.pro/informatica_powercenter_workflow_administration_guidezrh34.pdfIn PDF document text
    • https://radunepik.weebly.com/uploads/1/3/4/6/134617153/d9faf949574.pdfIn PDF document text
    • http://martans.space/forge_ahead_definition_englisha2qqm.pdfIn PDF document text
    • http://ig-support-service.com/chevy_traverse_2012_manuald073r.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/iVhbJxc/73395007287.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/8Ghgea2/phage_display_amplification_protocol.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/rujimidujek/countable_uncountable_nouns_worksheet_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/42976876219.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/clinometer_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/www_swar_marathi_new_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/88266509717.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/selenium_extent_report_jenkins.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/75449929005.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/54277879959.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_off0000db19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB19 5000 bytes
SHA-256: 1c926124be0246d01ee3fecb0e609393221204c7d26273bd48e7b26ca3639567
font_01_sfnt_off0000ec20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 10664 bytes
SHA-256: 7478f8fc0114b9daa885f9f8a8e0869f656d0ca969028305086b02ff6ee43b8a

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