Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0bbf7cbefbeb286…

MALICIOUS

PDF

44.8 KB Created: 2020-10-16 09:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a1e378624199a30ed4a49fc1d50ca337 SHA-1: e67f382b016c3c708a1a8300b046c24f05f648b2 SHA-256: b0bbf7cbefbeb2864b560aa36c59a7828c3c6d0537f955487bd0785e0c17df1b
184 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, many of which point to disposable hosting services and a known malicious redirector. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malware or phish for credentials. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/123?keyword=origami+paper+crane+step+by+step+instructions In PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/434c403aad55.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/fubugofowuju-derup.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/1889813.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/df4687ce.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f873cb87a071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f883c844c659.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/4029177.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/24c86.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/289db4a.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://cdn.shopify.com/s/files/1/0266/7560/9775/files/valitun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a34ae0-c477-4ca7-a1cb-d8b78f8c3cbd/fuxovoxuvedebirib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a7b3f7-8585-4905-a1c9-9aa2fc4f915a/5572290418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3076956-d124-49b3-8ccd-5d13d375c6e8/2260347909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f01d781-1e89-43bf-a4e2-dbe8ca0ac6ce/13174063043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6700b5bf-c3c6-418b-8ac2-f465b37acdcf/99360822198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231e2220-2456-47c3-8460-86a5e9d16666/xutewaguwirabefefumekusub.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_off000062ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CA 5372 bytes
SHA-256: 464d54fef80a9c3f928fc81ee91e2fee5850ef434d669b0df619165c759f1e05
font_01_sfnt_off000074f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F2 10324 bytes
SHA-256: 5757dabeec827f15a5ce8070444272ee1f75c9d195126f5e8322bc474522556b
font_02_sfnt_off0000976c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.