Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e4c67844d0f629…

MALICIOUS

PDF

43.9 KB Created: 2020-10-17 16:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: bd581ea6940a30e9d5e546b9cd8e88cb SHA-1: 77d556f2df5a65a26e508d80ad2c1defdd47404c SHA-256: b4e4c67844d0f629b042048e4f38c04ee391e7c0291cc5f791d2cea724776b47
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://ggtraff.ru/123?keyword=schaum+group+theory+pdf In PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/bolexevup.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/nuxogutokiku-jodowipune-rigifukesawosud-jasexizob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8705c2935c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f87fc0d52524.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/1/0484/7114/6650/files/bujudedafexepofoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2166/1856/files/ge_profile_microwave_jvm1790sk01_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2804/4698/files/xabuwak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6331/9969/files/sokuzabaxegegut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0330/8962/files/12326766792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e9bf36-a688-4ca9-bfda-0488cc5b56a9/nopugobibarokudejewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/fozaradu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/76405163000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0292/0611/files/parents_guide_game_of_thrones_season_8_episode_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1413/8267/files/entry_deterrence_game_theory_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5346/5243/files/reddit_summoners_war_promo_code_2019.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47A0 5292 bytes
SHA-256: 0c6ca5192bfae9d6ec46270ffe4601f126f04a36e2ec7bd09d985db3102fc8f7
font_01_sfnt_off0000599f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x599F 10316 bytes
SHA-256: c848eb77ecff9f866485f1eb711cd2c8b78a3e7d83661db47e868420bdbc8383
font_02_sfnt_off00007c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C85 16892 bytes
SHA-256: f05cdba4b0aab70eec596a0a3230405ce81461afe326a0ac740c6701521dd638
font_03_sfnt_off00009482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9482 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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