Malicious PDF — malware analysis report

Static analysis result for SHA-256 eacd44bb63754349…

MALICIOUS

PDF

45.0 KB Created: 2020-06-09 00:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d52abb5ef50524514c961834cdfd7856 SHA-1: bac97eea0f9eff6ec93fdc8fa1900d36d9cb7a24 SHA-256: eacd44bb63754349e248481c3093a808100b1ee0244b0643929fa0b3ecfb87a6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to SEO-optimized PDF files hosted on various domains. The document body text, though obfuscated, contains a URL that appears to be a lure for adult content, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier strongly supports the malicious verdict.

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 http://74-123-78-183.mgwnet.com/uploads/1/3/0/5/130589250/130589250.html#dev+avc%25C4%25B1s%25C4%25B1+jack+t%25C3%25BCrk%25C3%25A7e+dublaj+izle+full+youtube
    • http://yverebi.com/uploads/1/3/0/7/130775808/7919882.pdf
    • http://heatherjulien.com/uploads/1/3/0/3/130379625/fa12da.pdf
    • http://ectorinvestments.org/uploads/1/3/0/4/130489434/a60a1f56194f.pdf
    • http://paperfreeinventory.com/uploads/1/3/1/3/131380915/5466822.pdf
    • http://hotlavacoach.com/uploads/1/3/0/6/130605438/zafuwibomexudamox.pdf
    • http://southernappalachianworkcenter.org/uploads/1/3/0/6/130603808/xowogadukefutuj.pdf
    • http://boyceneilcarter.com/uploads/1/3/1/4/131438164/kifavifezi-xenixugetuwob-fakufalopomebi.pdf
    • http://cryptocashusa.com/uploads/1/3/0/5/130589085/duvotipu-fodizedogumu.pdf
    • https://lewewijib.files.wordpress.com/2020/06/43669953742.pdf
    • https://vasotox.files.wordpress.com/2020/06/23082290481.pdf
    • https://domunilide.files.wordpress.com/2020/06/85579668944.pdf
    • https://wuniliruk.files.wordpress.com/2020/06/64570538978.pdf
    • https://janavitim807994190.files.wordpress.com/2020/06/55031511945.pdf
    • https://nobivewix214068776.files.wordpress.com/2020/06/76739462003.pdf
    • https://sowekurodaji.files.wordpress.com/2020/06/vanav.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bdf.bin
656fea529b9180e8c6a0382ddb9cf2af45ed9c27ec243d8a536dc571d038bd12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDF 14040 bytes

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