Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be737148f934851…

MALICIOUS

PDF

65.6 KB Created: 2020-11-04 02:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: b1afad0f7ddf0f4167667e11f3b653da SHA-1: c3657eb8baa68e7f6bd7b067d2f39d87f6c84f2e SHA-256: 5be737148f93485112e6e81c8219499159de4166255145b7d3ae0f9b4422d38c
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=linear+parent+function+graph In PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/woxetukiwino_mupizazetanev_wofigagidip.pdfIn PDF document text
    • https://vodemilofokuse.weebly.com/uploads/1/3/4/2/134235674/1022143.pdfIn PDF document text
    • https://movidotibapokab.weebly.com/uploads/1/3/4/2/134265591/temakisemizitikaxo.pdfIn PDF document text
    • https://luxexawasoju.weebly.com/uploads/1/3/4/1/134109261/ac3782e5a366d71.pdfIn PDF document text
    • https://ruxibero.weebly.com/uploads/1/3/4/4/134403554/xexibe.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/1300040.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/venefukagimavogop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3830/7994/files/85615418840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0abba8f-2cff-4139-aaf8-347a6fa79820/brisa_retractable_screen_door_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/little_red_sled_nebraska.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/marakujomoxigazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc6d15d-b9df-49ef-9ac1-af686fe448cf/1547589903.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/ergoline_error_code_102.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/camino_de_santiago_frances_etapas_a_pie.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_off0000bf1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1B 5008 bytes
SHA-256: df5f8afccf6ed176d680bc57c8395f5017b63f2b149262dce804e7948d1e8f56
font_01_sfnt_off0000d02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02B 12644 bytes
SHA-256: fa55db7bd4d529eb4d1cdffcaec9c80d2da91ce52f496c0295f5efd7dd62a248

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