Malicious PDF — malware analysis report

Static analysis result for SHA-256 642bc7c29f0a4eb9…

MALICIOUS

PDF

49.2 KB Created: 2020-10-26 08:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: f72f93f271b73d19671d67f984bde1fa SHA-1: 8fbed0813fdc06d12320a9c530cd66b7afe93923 SHA-256: 642bc7c29f0a4eb9c9e9f8baf149a37d023c7633ecae05255be0de4b21de1bb3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/aws?keyword=isaiah+berlin+four+essays+on+liberty+pdf In PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/vipogum_magufutalud.pdfIn PDF document text
    • https://zuxizakubapepo.weebly.com/uploads/1/3/4/3/134317428/3313512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/who_moved_my_cheese_full_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/9384/4655/files/litixamenek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/todemowesog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5932/2778/files/vex_3_dylans_unblocked_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0826/0763/files/sixaxis_controller_apk_download_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3221920-9a97-4bc9-819d-b19965125312/74150298514.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/bipolar_hemiarthroplasty.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/xapigaxolikonimu.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/16498169573.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/26175426214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/15520203321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5449/7443/files/reruno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/download_game_mod_apk_ghost_battle_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5182/6343/files/jowaxivugelalodutuvuxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3159/3628/files/55032053325.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/79633557667.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/australia_visitor_visa_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/cambridge_checkpoint_past_papers_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/11903798372.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B5 5188 bytes
SHA-256: f0eacd43a16e5eb56a7b47372e75b42b1e149340f893d61ad09d749c11735e7e
font_01_sfnt_off00008542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8542 10316 bytes
SHA-256: be056931971d0a63a6f9c06b7f026c043ab44487f4d7acf865106da701716026
font_02_sfnt_off0000a8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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