Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ecc296da76190a…

MALICIOUS

PDF

43.1 KB Created: 2020-10-25 03:01:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e3923f1c953e2e7956b0bdc8febece67 SHA-1: 2374a2aa98cc3cc46b50214a6439506d408d8c22 SHA-256: b9ecc296da76190a0b9d9455bc635f7a4cb6d3f76c555880c19f313c7fb9b7e6
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://ttraff.me/aws?keyword=staff+performance+appraisal+sample+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f8819346d4ef.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/349752e83.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/712e5af8a.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/desekego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f8f4a50444ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388283/normal_5f9067e0eb31b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f8ecd6ac7916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f92068e111f0.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/zarelusipofox/union_budget_2017-_18_highlights.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/wololuxetesevigi.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/mathematical_symbols_and_their_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/96030461040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/395a4db7-c03d-43f3-bc30-cbee89a22b3a/kpek_sesi_mp3_indir_dur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e55a223b-7632-48da-9781-6048205fcad9/putaboridabinewofa.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_off00006a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4E 5404 bytes
SHA-256: 34339134db672f09fad9d2ae69b485e040eda3916fe5c28ef7d24874de01ab12
font_01_sfnt_off00007c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C97 10240 bytes
SHA-256: fffc7dfb567e213ab080a806035327285c56beeccff3c0ca030f1960b8bbd2da