Malicious PDF — malware analysis report

Static analysis result for SHA-256 949196582899435b…

MALICIOUS

PDF

46.0 KB Created: 2020-10-03 10:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b04822fc1d78db179c92be7cb7e0244f SHA-1: ed7012b0dd1362dfb77a96d26dc57fc0b0a6beab SHA-256: 949196582899435bb6eafd88dabc7d5329259a9f782f02b91cf65340083556c2
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://gettraff.ru/pify?keyword=vigrx+plus+review+supplement+critique In PDF document text
    • http://files.thekerikgroup.com/uploads/1/3/1/8/131857476/8280991.pdfIn PDF document text
    • http://files.communicationtwentyfourseven.com/uploads/1/3/0/7/130738805/zigegirojeba.pdfIn PDF document text
    • http://files.unidadepastoral.com/uploads/1/3/1/4/131437351/195585ef.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/d07f502a-932f-4df5-9eda-9493ba7da5f4/nedilumowitupematugitigox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b27c8e3-322d-4705-a730-f925fee90a6f/61947850180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1abf0c2-18f7-4fd0-950d-68d3695966ad/43285793266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e6ec7bb-2cd3-4b46-bfc5-203126f44a94/70244932781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b221175-8c73-4db0-824d-4bf547f89a06/5097711420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35965d0-c368-4ffa-bd90-dbb3abcad9d0/99967894542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c62ef6-c3bd-42f0-a089-65e3b54256a5/62790095977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68732178-3252-482f-b14d-bd28158b8599/58151560811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b4fdd9-08a1-4976-bad4-263d8b5e8010/buloxepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f0f8402-dcb8-4373-b48a-5d7bfa7fe463/legupelulexo.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_off0000669c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669C 5124 bytes
SHA-256: ea011380eb0c2de7de4c51a07f7b817ad7446a52c60afacd943a2d6d42d7c0d4
font_01_sfnt_off00007812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7812 10888 bytes
SHA-256: 718eb6342047194bc0e238998bd11c2ab22aad99bd6df5c4654eed20362df184
font_02_sfnt_off00009d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D45 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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