Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bbd0851183214b…

MALICIOUS

PDF

36.4 KB Created: 2020-11-05 15:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 0fcfe4fb5dd525814ce079b107749e30 SHA-1: a5d5651b1bcf9b61c69cf37c6ed14fa0107b7518 SHA-256: 05bbd0851183214b703f93b36c3e677e7720f5164c7b45f55e32f2b5efc622e1
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/aws?keyword=mortal+kombat+2+emulator+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5f8e09835c989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381737/normal_5f8c45790a456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f9aa51e583b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_5f9a1204cbb11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426686/normal_5f9e5e624474c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392872/normal_5f924b493c0fe.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/0dabe862-458c-4e1e-a92c-7e57dedbeae3/advanced_accounting_12th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2735/4528/files/hakone_onsen_japan_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3c7135-9f14-43b9-bfe0-42e567beb183/42136509095.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/degezojogifepewo.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/cs_to_s_conversion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4863/9907/files/75664824153.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_off00004443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4443 5060 bytes
SHA-256: 3870dfe9c7a0037dd0e0422d771d6ec191cd0b954b4b76a73bafd90baaf81e87
font_01_sfnt_off00005573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5573 9772 bytes
SHA-256: 5c818e90478e8237a1463f80694bf674a6a89a1e8497129126f02c538abf95ca
font_02_sfnt_off000076d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D7 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2