Malicious PDF — malware analysis report

Static analysis result for SHA-256 850d896822a89ba9…

MALICIOUS

PDF

67.0 KB Created: 2021-02-11 19:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 647629a169ff5059cc8b1e9976666a2c SHA-1: 1170783e9931d1da9b321e65d6db96cec029ef1f SHA-256: 850d896822a89ba94d0e4b43d75b1bb5d8052b4fd228c8916a655e3581003815
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=los+alamitos+library PDF link annotation
    • https://cdn.sqhk.co/vuwonesi/bjj0geh/movie_trivia_schmoedown_bracket.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/hJnJgcg/bitamukoros.pdfIn PDF document text
    • http://aicberg.net/64044184219zhupu.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/is_tutuapp_safe_for_androidr5ajf.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/6021643.pdfIn PDF document text
    • http://boxidodo.22web.org/pakusulomaven.pdfIn PDF document text
    • https://ribofefafuf.weebly.com/uploads/1/3/4/7/134770843/kujuwarimumujaxivi.pdfIn PDF document text
    • http://sakabeg.iblogger.org/app_store_counter.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/cibhfhh/fantasy_war_tactics_r_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://newiroxupamorik.rf.gd/quickbooks_general_ledger_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/gospel_hymns_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/vuwozekadasa.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/kegem.pdfIn PDF document text
    • http://jifazuniduvosi.epizy.com/ff14_baelsar_s_wall_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/member_function_template_in_c_with_example.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/black_desert_mobile_apk_english.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/100_egyptian_cotton_sheets_800_thread_count.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/american_truck_simulator_update_1._30.pdfIn PDF document text
    • http://darelarara.epizy.com/degudapanisuluwutati.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_off0000c738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC738 5012 bytes
SHA-256: c4ca4c968c1c8b9836ffc72607105eeb7ff30b24d1ceedcebda74f1b33b66093
font_01_sfnt_off0000d837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD837 11408 bytes
SHA-256: e7cc938c37c58b413d9f5a7d864bea0aa9340d0cee20a4426cca6599cb10a6d7