Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fe9d9ab512784c…

MALICIOUS

PDF

43.7 KB Created: 2020-10-07 07:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 88bae467052ecb1deb74885dbed81e44 SHA-1: 7e751a211974ed3fb0f44a5c30bc1f38518007dd SHA-256: 22fe9d9ab512784c87a4870c9dbe87c116537a8907d3663c1cc3bc46b3f985eb
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/strik?keyword=como+calcular+rumbo+y+azimut+topografia+pdf In PDF document text
    • http://famekefa.stgeorgeseniorsoftball.com/uploads/1/3/2/8/132814343/7314633d88.pdfIn PDF document text
    • http://files.gekkonidazed.com/uploads/1/3/0/7/130740612/juduvijopovikiz.pdfIn PDF document text
    • http://files.rost-collage.com/uploads/1/3/0/8/130813095/3870841.pdfIn PDF document text
    • http://bavuli.personalpilatesma.com/uploads/1/3/0/7/130739235/d91eb7bf6b.pdfIn PDF document text
    • http://mikub.ridgeburycongregationalchurch.org/uploads/1/3/0/8/130814623/sapalamujenag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff26c6f-e25e-4ce5-b822-23887d088d5a/rujonuzisififulatagur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04070861-6e39-4c88-92f9-016dadd19939/zigaduzanunawido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a32966ee-f015-47ab-8366-0dc89b520a5c/pawuxadategalaxufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbda909b-9827-4aca-9339-f042b319a8d7/jobuwafudebimuxinaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41f66a0-3fe3-46f2-8372-3165d350f854/vopazotujajaxaravava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/870571a2-85db-4f7f-88b1-6f7ce6c25c7f/11523463271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bf2ef7f-300d-4ce0-8238-39f668c36c71/dupoxaputalanowil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25827fd9-a3e7-4670-8a67-67b0ed4d4145/lakebife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5151541-4533-4525-be57-9cb532e66574/16885144841.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A04 5492 bytes
SHA-256: efac63f8bdf725c927e693bc2bca10fb6f8aaa4bbecc6ef67544e0220af567ba
font_01_sfnt_off00007cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAE 10664 bytes
SHA-256: 93aac7e97cb7e716e15ace97b7c5003fb6ee677a38c52d846b8e6e0d38bca1d7

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