Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92fad24f38ae109…

MALICIOUS

PDF

50.0 KB Created: 2020-11-09 04:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b20b8d485062db6f1bb7a959217cc07f SHA-1: 1ae3779ceca1d58f5f05778507d966d408707d82 SHA-256: d92fad24f38ae1096d845b026242c6a450c9e5efff5e7d0f5eae7d7ffb1a3082
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://traffine.ru/123?keyword=venom+movie+full+movie+online', is embedded within the document body, suggesting a lure to a malicious site. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/123?keyword=venom+movie+full+movie+online
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/82823.pdf
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f89280ece8b3.pdf
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f8e48ae612dc.pdf
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/8447576.pdf
    • https://cdn-cms.f-static.net/uploads/4376379/normal_5f910e7dacbf8.pdf
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/vubug_batogiju_jimegogu_jozurit.pdf
    • https://dedezeke.weebly.com/uploads/1/3/4/4/134494225/a98e507bb44b.pdf
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/wodij.pdf
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/705edbcd1.pdf
    • https://xosetumigex.weebly.com/uploads/1/3/4/3/134371377/lemepawikozobide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/97253b1f-3f87-471a-a47c-ed1829535125/farmington_nm_gross_receipts_tax_rate_2020.pdf
    • https://uploads.strikinglycdn.com/files/2a1fc454-2013-47db-bb0f-633fbdc92cee/fukejafawurelubezenojed.pdf
    • https://titolanije.files.wordpress.com/2020/11/medical_certificate_format_for_maternity_leave_kerala.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b07.bin
2a1faf5a97d7a60d195232f897dc83d635c82045a22cb3f05ac6ee40d194cb5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B07 4256 bytes
font_01_sfnt_off00008962.bin
466e24af236441e52660f89c3e9df508eef157ed4caa72204af7ec0202d14837
pdf-font-stream PDF embedded font (sfnt) at offset 0x8962 10480 bytes
font_02_sfnt_off0000acc4.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xACC4 4324 bytes