Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce87b48c31984ab…

MALICIOUS

PDF

42.7 KB Created: 2020-11-05 14:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 06cf4f288a65fadd0384a286837f35f8 SHA-1: 803d8e4d3652843f377a82cfeea8c92b5c0b683d SHA-256: 7ce87b48c31984ab203e4d974598a37645d40bbe8cad49ae2690b062fca41183
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://ggtraff.ru/aws?keyword=old+town+guide+119+canoe In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_5fa0edfc79169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383678/normal_5f9239dbe7208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f891799c5c18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5f8af4df8e235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_5f8fe1984d0c2.pdfIn PDF document text
    • https://jeretidaker.weebly.com/uploads/1/3/4/5/134595905/koxafenujogawub.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://s3.amazonaws.com/napejaxosinages/email_extractor_online_from.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/760_area_code_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/rozimotoripete.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/textbook_of_microbiology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c813797f-312a-4147-9395-1dc370be260f/96038764356.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_off00005aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEC 5040 bytes
SHA-256: 2c2e02146e21e3a1342a5e04c3d3d84c6a246fcea0d5e29bc953a7476dcf60f1
font_01_sfnt_off00006c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C47 10540 bytes
SHA-256: 0420eb8057e90cb2aa0a302a61834539a70cf3087855fed7101d885cb91e63e4
font_02_sfnt_off00009051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9051 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3