Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff43f56e672650b2…

MALICIOUS

PDF

69.7 KB Created: 2021-03-03 18:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: be0401e50bd46398499ef25bba49c532 SHA-1: 34cd1e5175d62a91579b6a33a24a07032227b39f SHA-256: ff43f56e672650b263abe07f8e368493fe957cfce4176c8184fee276338bdeff
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://yafferge.ru/award?keyword=canon+vixia+hf+r800+battery In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410015/normal_5fdc097abc934.pdfIn PDF document text
    • http://verifiedbadges-form.com/secondary_2_inverse_functions_worksheet_answers0j24i.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/mississippi_drivers_permit_test_booklet.pdfIn PDF document text
    • http://copytoshka.ru/clip_studio_paint3ftrt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373999/normal_5fdca93c17640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500887/normal_602ae69c5f36b.pdfIn PDF document text
    • http://clobuss.ru/julavo5lyr.pdfIn PDF document text
    • http://boxoxafu.iblogger.org/smart_watch_u8.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/is_tokyo_ghoul_season_3_coming_out.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/pearson_education_canada_worksheets.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/zomokatak.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/betefowubevat/60365780297.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/kindle_fire_hd_video_formats.pdfIn PDF document text
    • http://livirava.atwebpages.com/dan_brown_inferno_summary.pdfIn PDF document text
    • http://woxiriselof.epizy.com/epson_perfection_v550_photo_preis.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/calidad_de_vida_definicion_segun_autores.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/string._format_example_lua.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/upsc_csat_paper_2017_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/present_perfect_vs_past_simple_multiple_choice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/how_to_use_a_2_ton_hydraulic_bottle_jack.pdfIn PDF document text
    • http://zorijefugixor.atwebpages.com/videtupafexejil.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/agro_climatic_regions_of_india.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_off0000d3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B9 5256 bytes
SHA-256: 130c4e3a5c742c9ab4d9898d2652cca79ed3bc12440c551d94d31f0988a4ab64
font_01_sfnt_off0000e5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 10188 bytes
SHA-256: d7e5a85e39e6457f2f09cf71116b9c1928868d7454ccc10cb42f18998c280f9a