Malicious PDF — malware analysis report

Static analysis result for SHA-256 d503c4f381652201…

MALICIOUS

PDF

45.7 KB Created: 2020-11-07 23:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 184589737b7d39c1f5085df3b56731bf SHA-1: 3a5092c2bd59160a9d8328e06566757694c2727d SHA-256: d503c4f381652201d134bc472783d0a9a0385154664d0de63ced030d9ca66d46
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful websites.

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://traffking.ru/123?keyword=philippine+folk+dancing+tutorial In PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/rusisikojaruwe.pdfIn PDF document text
    • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/8979559.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/9100683.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zomizekakigo.files.wordpress.com/2020/11/67515823558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8df58d-e0e2-4565-9325-c4a2229197e5/meal_replacement_shake_comparison_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a7d6a1-76d5-43b4-a7bb-3024a2f04981/domisadideg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef2f798-51cc-48a2-b1b6-3a702d40e43e/31387957355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07b7bd7-c5bb-43b4-8a8f-af78e754a642/54922057662.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/najegufulasujepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e8b2a58-3954-43fc-a2c6-d279cc08e3d4/xotafalebom.pdfIn PDF document text
    • https://pazeden.files.wordpress.com/2020/11/86767518253.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_off00007530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7530 5304 bytes
SHA-256: c7b7930fc90c6336e50eaf48acdf46f9665a1386f8b654fd87cd6cba6840bbe6
font_01_sfnt_off0000873c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873C 10220 bytes
SHA-256: 28ac07f119e40cd368f077cc9134b7eb118896ec5f53a9d9eae6fc4332cc7f57

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