Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4f79108023ab3f…

MALICIOUS

PDF

66.3 KB Created: 2021-03-01 07:28:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e826b017f9b123db8e1ab6f3d4c7493f SHA-1: 2666d6c59f4cce921a03eae3482f5f7d521b7e30 SHA-256: ac4f79108023ab3f0b3901eb004aa0942bc748c50357ece1d9693481d538515e
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/award?keyword=the+golden+goblet+audiobook+chapter+1 PDF link annotation
    • http://sevetoxagejip.iblogger.org/night_owl_wired_camera_no_signal.pdfIn PDF document text
    • http://bapebofefo.22web.org/tezubapaw.pdfIn PDF document text
    • http://gafaneripebenu.iblogger.org/tax_audit_report_format_2017-_18.pdfIn PDF document text
    • http://zogaranana.22web.org/rimudisukatefexuna.pdfIn PDF document text
    • http://tajeromodovo.66ghz.com/mupob.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/wuroketo.pdfIn PDF document text
    • https://derigibi.weebly.com/uploads/1/3/4/4/134447264/195a76.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/fejatepudopito/risk_assessment_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/ligawusulu.pdfIn PDF document text
    • http://sokipev.epizy.com/the_shining_twins_names.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/shark_navigator_lift_away_deluxe_hepa_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/broadway_accompaniment_tracks.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/alcatel_lucent_ip_touch_4018_user_guide.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/4908093044.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/bee_gees_live_concert.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/65533657314.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/25105877176.pdfIn PDF document text
    • http://kowewewabozete.epizy.com/fomurojosupuwamolasu.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/viwelofo.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_off0000c8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DB 5360 bytes
SHA-256: 0b7372ff5c4773412afa43b919455ba79480774a0c0a87a7014e894069f38e6b
font_01_sfnt_off0000db0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0E 9684 bytes
SHA-256: 902e202989c1826d205d7faa0547be344b4796820f2bbe71320e12d4b7c97456