Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c14f6572ac9b9c5…

MALICIOUS

PDF

54.2 KB Created: 2020-11-06 20:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: a6d4179777ac1514bc8d7f7a4432c6e9 SHA-1: 46781fca5fa3d245aa8a5c8b48852d9bfd6a1ee4 SHA-256: 2c14f6572ac9b9c53b4399f27f18a624d530ef04b0bab1a097be6cc9cc2c06be
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/aws?keyword=enterprise+rent+a+car+bellevue+wash In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f99172683151.pdfIn PDF document text
    • https://jokepalebaja.weebly.com/uploads/1/3/4/3/134360350/kemigosufamapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_5fa3134a1d958.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/doxis_bikaxogo_vudelategabaxa.pdfIn PDF document text
    • https://panemomozig.weebly.com/uploads/1/3/4/5/134503052/pofatudevu.pdfIn PDF document text
    • https://junovolosexev.weebly.com/uploads/1/3/4/4/134467690/4268856.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/fc71a953-0453-4399-8735-eb121b653a6b/57791736662.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/lipoprotein_adalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9cb864-8f8f-456d-8a03-bcb76b7d5535/19819669261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59aa9b12-d13f-434d-aa98-93449990ea78/67335826750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb3da67-18ce-493a-810e-486eee92d601/nuwabezokajulekijulipiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759503d9-84f0-4d97-b404-77e5a238e0f6/average_atomic_mass_worksheet_answer_key.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_off000086de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DE 5044 bytes
SHA-256: 3706c80ae64634e06f64e802a091fafa1fba0a6c7f1d6172caaabcacc0ed39e9
font_01_sfnt_off000097ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97FF 11220 bytes
SHA-256: 65af5c7278f860d0c5d7af502821723702b881bcd69627b86b4eddb3f4964c6f
font_02_sfnt_off0000be0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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