Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1fb9baae8cba44…

MALICIOUS

PDF

50.7 KB Created: 2020-11-07 08:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2a6e147b0cc62a671ac302c272554e1a SHA-1: f181b1522d122d642fb37c1ef8d12061f9e321df SHA-256: fb1fb9baae8cba44f9ab8b5149d58b4d3c6ba41047b68267867d2ca0a5747cb3
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://traffmen.ru/123?keyword=karen+beecher+fluttershy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_5f9250b770e6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f8bd748063e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5f96b995e9691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f891935836f3.pdfIn PDF document text
    • https://fimelaxezabu.weebly.com/uploads/1/3/4/6/134622198/mixifisi_gofomapuposinus_jepisatokivit.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/3326568.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://givolajokofe.files.wordpress.com/2020/11/japatewajaliwififu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/effc193f-8a76-484c-8f9b-cf3af4356995/dufuxagorulon.pdfIn PDF document text
    • https://sisiviweze.files.wordpress.com/2020/11/goresosuvufat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f66141-2921-4b60-bf02-96d902d4abbd/bidituv.pdfIn PDF document text
    • https://laridemada.files.wordpress.com/2020/11/53481750825.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6324 4904 bytes
SHA-256: 8bcd2f4b038d6ae3755698c94c2e64af0f1ceb3dc80419e16ee67a7611cfb2c9
font_01_sfnt_off000073cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CC 11668 bytes
SHA-256: 0747247bd119a3c03e24253edcbfafbd02dae80688c2094a7d38040dda0180bb
font_02_sfnt_off00009a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A24 16384 bytes
SHA-256: a8f82ce1cdc57d6cf73caeb35ba0a534b8f114798d4dfc5d6ed82df03316e49d
font_03_sfnt_off0000afed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFED 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34