Malicious PDF — malware analysis report

Static analysis result for SHA-256 659f614d2a2b4c2b…

MALICIOUS

PDF

49.9 KB Created: 2020-10-07 21:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 3fb2cf43876227d597fc3c72bcfb75d1 SHA-1: 54026cb46b41ed29a8a30cc6a5a9293f9ac1691a SHA-256: 659f614d2a2b4c2b9e406d226bf3c75b7a43a950bc2954b693b4b25fa1e0213e
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/pify?keyword=clarion+mcd360+manual In PDF document text
    • http://files.kathyskreationsballoonart.com/uploads/1/3/1/1/131163969/redireboxoxejuwu.pdfIn PDF document text
    • http://files.stewardstation.org/uploads/1/3/1/3/131398197/139071.pdfIn PDF document text
    • http://files.alexjtunney.com/uploads/1/3/1/4/131437246/jafudazepif_taterodupu_dumigefob_nejabamubipes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5077/3909/files/san_mateo_county_office_of_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/45836194557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2667/3575/files/mavunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9793/9861/files/sheer_wedding_dress_designers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8397/9680/files/polycom_voicestation_300_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5148/7910/files/what_is_system_analysis_and_design_in_software_engineering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/7943/3113/files/lineas_imaginarias_de_la_tierra_meridianos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd80053-5e4d-47f0-a7cc-d09728bcae80/31555351799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe65e50-873c-4806-b718-1c7b8b0640ec/78003286969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78d21fb0-0190-4506-a7df-c79e11b2272d/2742793085.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000855b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855B 5272 bytes
SHA-256: 275d6bb1b87f12f9cde88811355a773b33a1621ee8630a9232670d36a49e8d9d
font_01_sfnt_off00009726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9726 10540 bytes
SHA-256: 10a0292ddd0d9db6071535f1e1c4bf42d85795b103c05167f08661710bb87a77

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