Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bcd4cf00ccd062f…

MALICIOUS

PDF

60.2 KB Created: 2020-10-27 01:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aef926fb8b4bfc5f747f307b942b3830 SHA-1: 3e0ebec570f6755269f975a1bb957f1ce54daa2c SHA-256: 5bcd4cf00ccd062fe1be037b82f32f05765cca6e6ab92c8867139e1fe3cdf5dd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious content. One of the primary URLs identified is a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the structure and embedded URLs suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?keyword=busch+stadium+left+field+porch+seats In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370285/normal_5f946b518eb44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f95e46f6a432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f89aed782f45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5f8d5aee03fdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5f974aaf44201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f911e1f9204a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5f90b3e7a705b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5f9750759d67c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f92d5d562ecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f89678c28928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5f8e8d00709cd.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/7d07f6ed9f.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/ninamug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f871197f2ad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415080/normal_5f95b892bf586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f87e94358611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5f8b9ee8ec9d8.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://uploads.strikinglycdn.com/files/5330d022-0730-4425-b44d-2ddfe1dc1009/fifty_shades_of_grey_download_vidmate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51891d85-9555-40a6-8747-bc45adda8eb6/ruxajibiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8c1e17-6427-4267-bdc6-f3f21733f1e5/10812029932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f44ede05-62bb-4dbe-a1ee-1399f96de9e7/diseo_y_distribucion_de_planta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35965d0-c368-4ffa-bd90-dbb3abcad9d0/99967894542.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_off00009c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6D 5220 bytes
SHA-256: e42dde5dd0cfd21051ad03fa01af7ba2120fc0ec77885639aa1de019e7c770c1
font_01_sfnt_off0000ae2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE2B 11564 bytes
SHA-256: f8c1c5bf0f3c0df42241a6784818ade8b3b38286d76585759196b161e4b3fc22
font_02_sfnt_off0000d515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD515 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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