Malicious PDF — malware analysis report

Static analysis result for SHA-256 be53e876ee93e00d…

MALICIOUS

PDF

76.3 KB Created: 2021-02-07 09:03:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 46d89f9c6cf22418262999b4343d729e SHA-1: 1f84eaa7bb13a994dc2dd4b82e86ed51eb8b546b SHA-256: be53e876ee93e00d37e167ac92bf4bbff0f7957793858630d659b55f5645189c
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=m.%20l.%20p%20ka%20full%20form In PDF document text
    • http://nejurizedutopi.iblogger.org/92314618020.pdfIn PDF document text
    • http://free-at.pro/funny_sound_effects_app_for_pct3hxh.pdfIn PDF document text
    • http://rituralajozeli.iblogger.org/watchos_6._0._1_won_t.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/haaZmjh/silicon_valley_season_6_dvd_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/9eifhfx/playroom_organization_hacks.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/U6c3jaA/furuwezavira.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/3127320.pdfIn PDF document text
    • http://busibear.com/mebexuponunegelinezom0c5sd.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/265468032728s8ai.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/bisegilupuf/best_compass_app_for_android_2018.pdfIn PDF document text
    • http://wavusuwu.epizy.com/levodopa_dosage_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/d_d_5e_bard_spell_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/change_bar_graph_color_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/vicroads_learners_test_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/balance_sheet_format_as_per_us_gaap.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_off0000eca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA8 4972 bytes
SHA-256: 2e8e74a701ebe72ce1107786007ca6d76f3fb2e6453592e2b1fec07214598882
font_01_sfnt_off0000fd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD98 11908 bytes
SHA-256: 932d387ae7fe564d37e21b536492b27e9989da2db56f9575342f35c4b1956623