Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59b604e2b5e2049…

MALICIOUS

PDF

55.4 KB Created: 2020-11-06 04:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b6740df17ee205086e174f42d6fa0301 SHA-1: 0470b43f5c6f5a22584e0ec51a8d05e62ad6e38c SHA-256: b59b604e2b5e2049aa6aca1897c0592cb5b2be4281ba7b368468b2986d6623eb
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://traffking.ru/123?keyword=adrian+shephard+gas+mask In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411501/normal_5f95bf8c8a16d.pdfIn PDF document text
    • https://durapafived.weebly.com/uploads/1/3/1/4/131438767/migisuguwi.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://uploads.strikinglycdn.com/files/a1913bd3-75f6-4f2b-ab1c-c9a20a7666fd/77024240117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85bfff9c-94e9-4a14-8cfe-e74f4e576bc6/cms_asc_infection_control_worksheet_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d02ce5e-bf00-4c91-a09e-025a934807fb/22709240375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57cc23bf-b5a4-4bb7-8028-59986b5cffec/22407249892.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/autodesk_revit_2018_architecture_fundamentals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/899a91cd-04d7-46d8-a67f-c184a3191f4d/pomagubivabavegok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c673015-cd4c-4536-94fd-1c3a2f5b7881/musd_school_calendar_2018_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f524c35-2a58-41de-b687-78a71fcefe5b/william_gibson_the_peripheral.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/scientific_method_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041a2298-a920-4967-a9a1-9a70417e9b1d/biographie_cheikh_ahmadou_bamba.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/85355496741.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_off00008b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B70 4992 bytes
SHA-256: 75f28abbc6142ea25e03bef86785d64eb9e0b94c15561ebbc127d05ae5a14615
font_01_sfnt_off00009c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C20 11932 bytes
SHA-256: 6dc5d482ff4aa12557263aff9e830f9bce5be81027242fdaa0ccbfc5120a57c3
font_02_sfnt_off0000c31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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